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Implement speculation rules - same origin conservative prefetch#48322

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yoavweiss:eng/Implement-conservative-same-origin-prefetch-speculation-rules
Oct 1, 2025
Merged

Implement speculation rules - same origin conservative prefetch#48322
webkit-commit-queue merged 1 commit into
WebKit:mainfrom
yoavweiss:eng/Implement-conservative-same-origin-prefetch-speculation-rules

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@yoavweiss yoavweiss commented Jul 21, 2025 •
edited by webkit-early-warning-system
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Implement speculation rules - same origin conservative prefetch
https://bugs.webkit.org/show_bug.cgi?id=295193

Reviewed by Alex Christensen.

This implements an initial version of same-origin prefetch speculation rules.

The feature enables prefetching an HTML document ahead of time ("immediate" eagerness),
or when the user started clicking an anchor element pointing at it ("conservative" eagerness).
That prefetched document is then used when the user actually navigates to this URL,
resulting in significant performance improvements.
Subresources of the prefetched document are not yet loaded before navigation, nor does it begin its processing.

HTML spec PR for speculation rules: whatwg/html#11426
Spec for the prefetch parts: https://wicg.github.io/nav-speculation/prefetch.html

* LayoutTests/TestExpectations: Add a few failing expectations.
* LayoutTests/imported/w3c/web-platform-tests/clear-site-data/support/clear-site-data-cache.py: Added.
(generate_png):
(generate_png.chunk):
(main):
* LayoutTests/imported/w3c/web-platform-tests/clear-site-data/support/clear-site-data-prefetchCache.py: Added.
(main):
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/external-speculation-rules-errors-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/invalid-rules.https_prefetch-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/invalid-rules.https_prerender-expected.txt: Progression
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/anonymous-client.https-expected.txt: Failure instead of timeout.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/clear-prefetch-cache-after-clear-site-data-cache.https-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changed-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=unchanged-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=unchangedWithRedirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cross-origin-cookies-anonymous-client-ip-duplicate.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cross-origin-cookies.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators-2.https-expected.txt: Timeout.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_cross-site-1-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_cross-site-2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=and-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=baseURLChangedByBaseElement-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=baseURLChangedBySameDocumentNavigation-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=defaultPredicate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=hrefMatches-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=immediateMutation-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=invalidPredicate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkHrefChanged-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkInShadowTree-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkToSelfFragment-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=newRuleSetAdded-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=not-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=or-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatches-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesDisplayLocked-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesDisplayNone-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesScopingRoot-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=unslottedLink-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/duplicate-urls.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/fragment.https-expected.txt: Progrssion.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/implicit-source.https-expected.txt: Progrssion.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-a-element.sub.https_cross-site-expected.txt: Progrsssion (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-a-element.sub.https_same-site-expected.txt: Progrsssion (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-iframe-location-href.sub.https_cross-site-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-iframe-location-href.sub.https_same-site-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-window-open.sub.https_cross-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-window-open.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/multiple-url.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=false&bypass_cache=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=false&bypass_cache=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=true&bypass_cache=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=true&bypass_cache=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=afterResponse-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=noPrefetch-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=waitingForRedirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=waitingForResponse-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_bypass_cache=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_default-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_prefetch=true&bypass_cache=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/no-http-cache-interference.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/no-prefetch-for-post.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=BaseCase-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=CSPExemption-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=EmptyRuleSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailCORS-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailToParseRuleSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailToParseSpeculationRulesHeader-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FollowRedirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InnerListInSpeculationRulesHeader-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InvalidMimeType-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InvalidUrlForSpeculationRulesSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=RelativeUrlForCandidate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=RelativeUrlForSpeculationRulesSet-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=StatusCode199-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=StatusCode404-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=UseNonUTF8EncodingForSpeculationRulesSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=http&to_protocol=http-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=http&to_protocol=https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=https&to_protocol=http-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=https&to_protocol=https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=200&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=250&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=299&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=400&should_prefetch=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=500&should_prefetch=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-traverse-reload.sub-expected.txt: Progression (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-uses-cache.sub.https_cross-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-uses-cache.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=cross-site-initial-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=cross-site-redirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=same-origin-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=cross-site-initial-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=cross-site-redirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=same-origin-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=cross-site-initial-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=cross-site-redirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=same-origin-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_2-2-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_3-3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_4-4-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_5-5-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_6-6-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_7-7-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_8-last-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_2-2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_3-last-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_2-2-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_3-3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_4-last-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/same-origin-cookies.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/same-origin-cookies.https_2-last-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/sec-fetch-headers.https-expected.txt: Progression (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/user-pass.https_cross-origin=false-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/user-pass.https_cross-origin=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/script-supports.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/cross-site-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/cross-site-to-same-site-redirection-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/deduped-and-sorted-tags.https_type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/deduped-and-sorted-tags.https_type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=rule&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=rule&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=ruleset&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=ruleset&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/no-tags.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prefetch-eagerness-pointer-down.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prefetch-eagerness-pointer-hover.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prerender-target-hint.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/same-site-to-cross-site-redirection-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=rule&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=rule&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=ruleset&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=ruleset&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/websockets/constants.sub.js: Updated.
* LayoutTests/platform/gtk/TestExpectations: Skip platform-specific failing tests for now.
* LayoutTests/platform/mac-wk1/TestExpectations: Skip service-worker reliant tests.
* LayoutTests/platform/win/TestExpectations: Skip platform-specific failing tests for now.
* LayoutTests/platform/wpe/TestExpectations: Skip platform-specific failing tests for now.
* Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml: Add a preference to enable the feature.
* Source/WebCore/Headers.cmake: Add new headers.
* Source/WebCore/Sources.txt: Add new source files.
* Source/WebCore/WebCore.xcodeproj/project.pbxproj: Add new files.
* Source/WebCore/bindings/js/ScriptController.cpp:
(WebCore::ScriptController::registerSpeculationRules): Parse and set new speculation rules.
* Source/WebCore/bindings/js/ScriptController.h:
* Source/WebCore/dom/Document.cpp:
(WebCore::Document::Document):
(WebCore::Document::resolveStyle): Call considerSpeculationRules.
(WebCore::Document::updateBaseURL): Call considerSpeculationRules.
(WebCore::Document::considerSpeculationRules): Check if speculation rules indicate we need to prefetch new documents.
(WebCore::Document::speculationRules const):
(WebCore::Document::speculationRules):
(WebCore::Document::prefetch): Kick off a document prefetch.
* Source/WebCore/dom/Document.h:
* Source/WebCore/dom/ScriptElement.cpp:
(WebCore::ScriptElement::determineScriptType): Add "speculationrules" as a script type.
(WebCore::ScriptElement::prepareScript): Call registerSpeculationRules.
(WebCore::ScriptElement::registerSpeculationRules): Register speculation rules for the document.
* Source/WebCore/dom/ScriptElement.h:
* Source/WebCore/dom/ScriptElementCachedScriptFetcher.h:
(WebCore::ScriptElementCachedScriptFetcher::isSpeculationRules const):
* Source/WebCore/dom/ScriptType.h:
* Source/WebCore/dom/SpeculationRulesMatcher.cpp: Implements speculation rules matching.
(WebCore::matches): Checks if a rule matches.
(WebCore::SpeculationRulesMatcher::hasMatchingRule): Entry point that that checks if an anchor element should be prefetched.
* Source/WebCore/dom/SpeculationRulesMatcher.h:
* Source/WebCore/dom/TrustedTypePolicy.cpp: Unified build fix.
* Source/WebCore/html/HTMLAnchorElement.cpp: Check if an anchor should be prefetched.
(WebCore::HTMLAnchorElement::defaultEventHandler): Implements the "conservative" eagerness heuristic and prefetches matching anchors on keydown/pointerdown.
(WebCore::HTMLAnchorElement::attributeChanged): Check speculation rules on attribute change.
(WebCore::HTMLAnchorElement::insertedIntoAncestor): Check speculation rules on insertion.
(WebCore::HTMLAnchorElement::setFullURL): Check speculation rules when the URL changes.
(WebCore::HTMLAnchorElement::setShouldBePrefetched): Indicates that an anchor should be prefetched.
(WebCore::HTMLAnchorElement::checkForSpeculationRules): Checks speculations rules and called setShouldBePrefetched.
* Source/WebCore/html/HTMLAnchorElement.h:
* Source/WebCore/html/HTMLScriptElement.h: Add "speculationrules" script type.
* Source/WebCore/loader/DocumentLoader.cpp:
(WebCore::DocumentLoader::setRequest):
(WebCore::DocumentLoader::loadMainResource):
* Source/WebCore/loader/DocumentPrefetcher.cpp: Handle document prefetching.
(WebCore::DocumentPrefetcher::DocumentPrefetcher):
(WebCore::DocumentPrefetcher::~DocumentPrefetcher):
(WebCore::isPassingSecurityChecks): Run security checks.
(WebCore::makePrefetchRequest): Request the prefetched document.
(WebCore::DocumentPrefetcher::prefetch): Prefetch the document if it passes all checks.
(WebCore::DocumentPrefetcher::responseReceived): Implement responseReceived to run the completion handler.
(WebCore::DocumentPrefetcher::redirectReceived): Handle redirect responses.
(WebCore::DocumentPrefetcher::notifyFinished): Handle the resource finish notification.
* Source/WebCore/loader/DocumentPrefetcher.h:
(WebCore::DocumentPrefetcher::create):
* Source/WebCore/loader/FrameLoader.cpp:
(WebCore::FrameLoader::FrameLoader): Initialize m_documentPrefetcher.
(WebCore::FrameLoader::commitProvisionalLoad):
(WebCore::FrameLoader::loadResourceSynchronously):
(WebCore::FrameLoader::continueLoadAfterNavigationPolicy): Match navigation with a prefetched resource.
(WebCore::FrameLoader::prefetch): Prefetch a document.
* Source/WebCore/loader/FrameLoader.h:
* Source/WebCore/loader/ResourceLoaderOptions.h:
* Source/WebCore/loader/SpeculationRules.cpp: Added.
(WebCore::SpeculationRules::create):
(WebCore::SpeculationRules::prefetchRules const):
(WebCore::SpeculationRules::DocumentPredicate::DocumentPredicate):
(WebCore::SpeculationRules::DocumentPredicate::value const):
(WebCore::parseStringOrStringList):
(WebCore::parseDocumentPredicate):
(WebCore::parseSingleRule):
(WebCore::parseRules):
(WebCore::SpeculationRules::parseSpeculationRules):
* Source/WebCore/loader/SpeculationRules.h: Added.
* Source/WebCore/loader/cache/CachedRawResource.cpp:
(WebCore::shouldIgnoreHeaderForCacheReuse):
* Source/WebCore/loader/cache/CachedResource.cpp:
(WebCore::CachedResource::CachedResource):
(WebCore::CachedResource::redirectReceived):
(WebCore::CachedResource::addClientToSet):
* Source/WebCore/loader/cache/CachedResource.h:
(WebCore::CachedResource::allowsCaching const):
* Source/WebCore/loader/cache/CachedResourceLoader.cpp:
(WebCore::CachedResourceLoader::allowedByContentSecurityPolicy const): Add MainResource as an option.
(WebCore::CachedResourceLoader::shouldUpdateCachedResourceWithCurrentRequest):
(WebCore::isResourceSuitableForDirectReuse):
(WebCore::CachedResourceLoader::updateCachedResourceWithCurrentRequest):
(WebCore::mustReloadFromServiceWorkerOptions):
(WebCore::CachedResourceLoader::determineRevalidationPolicy const):
* Source/WebCore/loader/cache/CachedResourceRequest.h:
(WebCore::CachedResourceRequest::allowsCaching const):
* Source/WebCore/page/PerformanceResourceTiming.cpp:
(WebCore::networkLoadTimeToDOMHighResTimeStamp):
* Source/WebCore/platform/ReferrerPolicy.cpp:
(WebCore::parseReferrerPolicy): Add SpeculationRules as a source for referrer policy.
* Source/WebCore/platform/ReferrerPolicy.h:
* Source/WebCore/platform/network/CacheValidation.cpp:
(WebCore::updateRedirectChainStatus):
* Source/WebCore/platform/network/CacheValidation.h:
* Source/WebCore/platform/network/HTTPHeaderNames.in: Add Sec-Speculation-Tags.
* Source/WebKitLegacy/mac/WebCoreSupport/WebFrameLoaderClient.mm:
(WebFrameLoaderClient::dispatchDidReceiveServerRedirectForProvisionalLoad):

Canonical link: https://commits.webkit.org/300829@main

7c254ee

Misc iOS, visionOS, tvOS & watchOS macOS Linux Windows
❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 🧪 unsafe-merge ✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@yoavweiss yoavweiss requested review from a team, JonWBedard, cdumez, gsnedders and rniwa as code owners July 21, 2025 12:56
@yoavweiss yoavweiss self-assigned this Jul 21, 2025
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Misc iOS, visionOS, tvOS & watchOS macOS Linux Windows
✅ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug   🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy ❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ❌ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@yoavweiss yoavweiss added the New Bugs Unclassified bugs are placed in this component until the correct component can be determined. label Jul 21, 2025
@yoavweiss yoavweiss marked this pull request as draft July 21, 2025 13:01
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@yoavweiss yoavweiss force-pushed the eng/Implement-conservative-same-origin-prefetch-speculation-rules branch from 71ece0b to 2540373 Compare July 21, 2025 16:51
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✅ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy ❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ❌ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@webkit-ews-buildbot webkit-ews-buildbot added the merging-blocked Applied to prevent a change from being merged label Jul 21, 2025
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✅ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug   🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2   🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy   🧪 ios-wk2-wpt   🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc   🧪 api-ios   🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2   🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2   🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@yoavweiss yoavweiss force-pushed the eng/Implement-conservative-same-origin-prefetch-speculation-rules branch from 755430e to b8b7acb Compare July 22, 2025 03:34
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✅ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy ❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy ❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@webkit-ews-buildbot webkit-ews-buildbot added the merging-blocked Applied to prevent a change from being merged label Jul 22, 2025
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✅ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 webkitpy ❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ❌ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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Misc iOS, visionOS, tvOS & watchOS macOS Linux Windows
❌ 🧪 style ✅ 🛠 ios   🛠 mac   🛠 wpe   🛠 win
✅ 🧪 bindings   🛠 ios-sim   🛠 mac-AS-debug   🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl   🧪 ios-wk2   🧪 api-mac   🧪 api-wpe
  🧪 ios-wk2-wpt   🧪 mac-wk1   🛠 wpe-cairo
  🛠 🧪 jsc   🧪 api-ios   🧪 mac-wk2 ✅ 🛠 gtk
  🛠 🧪 jsc-arm64   🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
  🛠 vision-sim   🧪 mac-wk2-stress   🧪 api-gtk
⏳ 🧪 vision-wk2   🧪 mac-intel-wk2   🛠 playstation
  🛠 tv   🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
  🛠 tv-sim   🧪 jsc-armv7-tests
  🛠 watch
  🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac   🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug   🧪 wpe-wk2 ⏳ 🧪 win-tests
✅ 🧪 webkitperl   🧪 ios-wk2 ✅ 🧪 api-mac   🧪 api-wpe
✅ 🧪 ios-wk2-wpt   🧪 mac-wk1   🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress   🧪 api-gtk
  🧪 vision-wk2   🧪 mac-intel-wk2   🛠 playstation
✅ 🛠 tv   🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
  🛠 tv-sim ❌ 🧪 jsc-armv7-tests
  🛠 watch
✅ 🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ⏳ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2   🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ⏳ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

achristensen07
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Comment thread Source/WebCore/dom/ScriptType.h Outdated
Comment thread Source/WebCore/dom/Document.cpp Outdated
Comment thread Source/WebCore/dom/Document.cpp
Comment thread Source/WebCore/dom/ScriptElement.cpp Outdated
Comment thread Source/WebCore/dom/SpeculationRulesMatcher.h Outdated
Comment thread Source/WebCore/loader/FrameLoader.h Outdated
Comment thread Source/WebCore/loader/SpeculationRules.cpp Outdated
Comment thread Source/WebCore/page/PerformanceResourceTiming.cpp Outdated
Comment thread Source/WebKitLegacy/mac/WebCoreSupport/WebFrameLoaderClient.mm Outdated
Comment thread Source/WebKitLegacy/mac/WebCoreSupport/WebFrameLoaderClient.mm Outdated
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Misc iOS, visionOS, tvOS & watchOS macOS Linux Windows
❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ⏳ 🧪 wpe-wk2 ⏳ 🧪 win-tests
✅ 🧪 webkitperl   🧪 ios-wk2   🧪 api-mac ⏳ 🧪 api-wpe
⏳ 🧪 ios-wk2-wpt ⏳ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc   🧪 api-ios   🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
✅ 🛠 vision-sim   🧪 mac-wk2-stress   🧪 api-gtk
  🧪 vision-wk2 ⏳ 🧪 mac-intel-wk2   🛠 playstation
✅ 🛠 tv   🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim   🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ⏳ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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Misc iOS, visionOS, tvOS & watchOS macOS Linux Windows
❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe ✅ 🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2 ✅ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ❌ 🛠 jsc-armv7
✅ 🛠 tv-sim ❌ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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Comment thread Source/WebCore/dom/ScriptElement.cpp Outdated
Comment thread Source/WebCore/dom/ScriptElement.cpp
Comment thread Source/WebCore/loader/DocumentLoader.cpp Outdated
Comment thread Source/WebCore/loader/DocumentLoader.cpp Outdated
Comment thread Source/WebCore/loader/FrameLoader.cpp Outdated
Comment thread Source/WebCore/loader/SpeculationRules.cpp Outdated
Comment thread Source/WebCore/loader/SpeculationRules.cpp Outdated
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❌ 🧪 bindings ❌ 🛠 ios-sim ❌ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2   🧪 win-tests
❌ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac ❌ 🧪 api-wpe
❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ❌ 🛠 wpe-cairo
❌ 🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ❌ 🛠 gtk
❌ 🛠 🧪 jsc-arm64 ❌ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
❌ 🛠 vision-sim ❌ 🧪 mac-wk2-stress ❌ 🧪 api-gtk
⏳ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ❌ 🛠 playstation
❌ 🛠 tv ❌ 🛠 mac-safer-cpp ❌ 🛠 jsc-armv7
  🛠 tv-sim ❌ 🧪 jsc-armv7-tests
  🛠 watch
  🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
  🧪 ios-wk2-wpt   🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios   🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2   🧪 mac-intel-wk2   🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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❌ 🧪 style ✅ 🛠 ios ✅ 🛠 mac ✅ 🛠 wpe   🛠 win
✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug   🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

achristensen07
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✅ 🧪 bindings ❌ 🛠 ios-sim ✅ 🛠 mac-AS-debug   🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ❌ 🧪 ios-wk2 ❌ 🧪 api-mac   🧪 api-wpe
❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ❌ 🛠 wpe-cairo
  🛠 🧪 jsc ❌ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64   🛠 vision   🧪 mac-AS-debug-wk2   🧪 gtk-wk2
  🛠 vision-sim ❌ 🧪 mac-wk2-stress   🧪 api-gtk
⏳ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2   🛠 playstation
  🛠 tv ❌ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
  🛠 tv-sim ✅ 🧪 jsc-armv7-tests
  🛠 watch
  🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
  🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios   🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision   🧪 mac-AS-debug-wk2 ❌ 🧪 gtk-wk2
✅ 🛠 vision-sim ❌ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ❌ 🧪 wpe-wk2 ❌ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ❌ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

achristensen07
achristensen07 approved these changes Sep 30, 2025
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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2 ✅ 🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ❌ 🧪 api-wpe
❌ 🧪 ios-wk2-wpt ❌ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ❌ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ❌ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ❌ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

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✅ 🧪 bindings ✅ 🛠 ios-sim ✅ 🛠 mac-AS-debug ✅ 🧪 wpe-wk2   🧪 win-tests
✅ 🧪 webkitperl ✅ 🧪 ios-wk2 ✅ 🧪 api-mac ✅ 🧪 api-wpe
✅ 🧪 ios-wk2-wpt ✅ 🧪 mac-wk1 ✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc ✅ 🧪 api-ios ✅ 🧪 mac-wk2 ✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64 ✅ 🛠 vision ✅ 🧪 mac-AS-debug-wk2 ✅ 🧪 gtk-wk2
✅ 🛠 vision-sim ✅ 🧪 mac-wk2-stress ✅ 🧪 api-gtk
✅ 🧪 vision-wk2 ✅ 🧪 mac-intel-wk2 ✅ 🛠 playstation
✅ 🛠 🧪 unsafe-merge ✅ 🛠 tv ✅ 🛠 mac-safer-cpp ✅ 🛠 jsc-armv7
✅ 🛠 tv-sim ✅ 🧪 jsc-armv7-tests
✅ 🛠 watch
✅ 🛠 watch-sim

@yoavweiss
Implement speculation rules - same origin conservative prefetch
a4a9e7f 
https://bugs.webkit.org/show_bug.cgi?id=295193

Reviewed by Alex Christensen.

This implements an initial version of same-origin prefetch speculation rules.

The feature enables prefetching an HTML document ahead of time ("immediate" eagerness),
or when the user started clicking an anchor element pointing at it ("conservative" eagerness).
That prefetched document is then used when the user actually navigates to this URL,
resulting in significant performance improvements.
Subresources of the prefetched document are not yet loaded before navigation, nor does it begin its processing.

HTML spec PR for speculation rules: whatwg/html#11426
Spec for the prefetch parts: https://wicg.github.io/nav-speculation/prefetch.html

* LayoutTests/TestExpectations: Add a few failing expectations.
* LayoutTests/imported/w3c/web-platform-tests/clear-site-data/support/clear-site-data-cache.py: Added.
(generate_png):
(generate_png.chunk):
(main):
* LayoutTests/imported/w3c/web-platform-tests/clear-site-data/support/clear-site-data-prefetchCache.py: Added.
(main):
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/external-speculation-rules-errors-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/invalid-rules.https_prefetch-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/invalid-rules.https_prerender-expected.txt: Progression
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/anonymous-client.https-expected.txt: Failure instead of timeout.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/clear-prefetch-cache-after-clear-site-data-cache.https-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changed-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=changedWithRedirect3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=unchanged-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cookie-indices.https_include=unchangedWithRedirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cross-origin-cookies-anonymous-client-ip-duplicate.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/cross-origin-cookies.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators-2.https-expected.txt: Timeout.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_cross-site-1-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_cross-site-2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/different-initiators.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=and-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=baseURLChangedByBaseElement-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=baseURLChangedBySameDocumentNavigation-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=defaultPredicate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=hrefMatches-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=immediateMutation-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=invalidPredicate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkHrefChanged-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkInShadowTree-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=linkToSelfFragment-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=newRuleSetAdded-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=not-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=or-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatches-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesDisplayLocked-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesDisplayNone-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=selectorMatchesScopingRoot-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/document-rules.https_include=unslottedLink-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/duplicate-urls.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/fragment.https-expected.txt: Progrssion.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/implicit-source.https-expected.txt: Progrssion.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-a-element.sub.https_cross-site-expected.txt: Progrsssion (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-a-element.sub.https_same-site-expected.txt: Progrsssion (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-iframe-location-href.sub.https_cross-site-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-iframe-location-href.sub.https_same-site-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-window-open.sub.https_cross-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/initiators-window-open.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/multiple-url.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=false&bypass_cache=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=false&bypass_cache=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=true&bypass_cache=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-delivery-type.https_prefetch=true&bypass_cache=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=afterResponse-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=noPrefetch-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=waitingForRedirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-requestStart-responseStart.https_include=waitingForResponse-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_bypass_cache=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_default-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_prefetch=true&bypass_cache=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/navigation-timing-sizes.https_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/no-http-cache-interference.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/no-prefetch-for-post.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=BaseCase-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=CSPExemption-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=EmptyRuleSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailCORS-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailToParseRuleSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FailToParseSpeculationRulesHeader-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=FollowRedirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InnerListInSpeculationRulesHeader-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InvalidMimeType-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=InvalidUrlForSpeculationRulesSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=RelativeUrlForCandidate-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=RelativeUrlForSpeculationRulesSet-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=StatusCode199-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=StatusCode404-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/out-of-document-rule-set.https_include=UseNonUTF8EncodingForSpeculationRulesSet-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=http&to_protocol=http-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=http&to_protocol=https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=https&to_protocol=http-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-single.https_from_protocol=https&to_protocol=https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=200&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=250&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=299&should_prefetch=true-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=400&should_prefetch=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-status.https_status=500&should_prefetch=false-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-traverse-reload.sub-expected.txt: Progression (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-uses-cache.sub.https_cross-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/prefetch-uses-cache.sub.https_same-site-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=cross-site-initial-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=cross-site-redirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-middle-of-prefetch.https_origin=same-origin-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=cross-site-initial-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=cross-site-redirect-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-to-prefetch-url.https_origin=same-origin-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=cross-site-initial-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=cross-site-redirect-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/redirect-url.https_origin=same-origin-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_2-2-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_3-3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_4-4-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_5-5-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_6-6-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_7-7-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https_8-last-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_2-2-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy-not-accepted.https_3-last-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_2-2-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_3-3-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/referrer-policy.https_4-last-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/same-origin-cookies.https_1-1-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/same-origin-cookies.https_2-last-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/sec-fetch-headers.https-expected.txt: Progression (partial failure).
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/user-pass.https_cross-origin=false-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/prefetch/user-pass.https_cross-origin=true-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/script-supports.https-expected.txt: Progression.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/cross-site-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/cross-site-to-same-site-redirection-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/deduped-and-sorted-tags.https_type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/deduped-and-sorted-tags.https_type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=rule&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=rule&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=ruleset&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/invalid-tags.https_tag-level=ruleset&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/no-tags.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prefetch-eagerness-pointer-down.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prefetch-eagerness-pointer-hover.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/prerender-target-hint.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/same-site-to-cross-site-redirection-prefetch.https-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=rule&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=rule&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=ruleset&type=prefetch-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/speculation-rules/speculation-tags/valid-tags.https_tag-level=ruleset&type=prerender-expected.txt: Failure.
* LayoutTests/imported/w3c/web-platform-tests/websockets/constants.sub.js: Updated.
* LayoutTests/platform/gtk/TestExpectations: Skip platform-specific failing tests for now.
* LayoutTests/platform/mac-wk1/TestExpectations: Skip service-worker reliant tests.
* LayoutTests/platform/win/TestExpectations: Skip platform-specific failing tests for now.
* LayoutTests/platform/wpe/TestExpectations: Skip platform-specific failing tests for now.
* Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml: Add a preference to enable the feature.
* Source/WebCore/Headers.cmake: Add new headers.
* Source/WebCore/Sources.txt: Add new source files.
* Source/WebCore/WebCore.xcodeproj/project.pbxproj: Add new files.
* Source/WebCore/bindings/js/ScriptController.cpp:
(WebCore::ScriptController::registerSpeculationRules): Parse and set new speculation rules.
* Source/WebCore/bindings/js/ScriptController.h:
* Source/WebCore/dom/Document.cpp:
(WebCore::Document::Document):
(WebCore::Document::resolveStyle): Call considerSpeculationRules.
(WebCore::Document::updateBaseURL): Call considerSpeculationRules.
(WebCore::Document::considerSpeculationRules): Check if speculation rules indicate we need to prefetch new documents.
(WebCore::Document::speculationRules const):
(WebCore::Document::speculationRules):
(WebCore::Document::prefetch): Kick off a document prefetch.
* Source/WebCore/dom/Document.h:
* Source/WebCore/dom/ScriptElement.cpp:
(WebCore::ScriptElement::determineScriptType): Add "speculationrules" as a script type.
(WebCore::ScriptElement::prepareScript): Call registerSpeculationRules.
(WebCore::ScriptElement::registerSpeculationRules): Register speculation rules for the document.
* Source/WebCore/dom/ScriptElement.h:
* Source/WebCore/dom/ScriptElementCachedScriptFetcher.h:
(WebCore::ScriptElementCachedScriptFetcher::isSpeculationRules const):
* Source/WebCore/dom/ScriptType.h:
* Source/WebCore/dom/SpeculationRulesMatcher.cpp: Implements speculation rules matching.
(WebCore::matches): Checks if a rule matches.
(WebCore::SpeculationRulesMatcher::hasMatchingRule): Entry point that that checks if an anchor element should be prefetched.
* Source/WebCore/dom/SpeculationRulesMatcher.h:
* Source/WebCore/dom/TrustedTypePolicy.cpp: Unified build fix.
* Source/WebCore/html/HTMLAnchorElement.cpp: Check if an anchor should be prefetched.
(WebCore::HTMLAnchorElement::defaultEventHandler): Implements the "conservative" eagerness heuristic and prefetches matching anchors on keydown/pointerdown.
(WebCore::HTMLAnchorElement::attributeChanged): Check speculation rules on attribute change.
(WebCore::HTMLAnchorElement::insertedIntoAncestor): Check speculation rules on insertion.
(WebCore::HTMLAnchorElement::setFullURL): Check speculation rules when the URL changes.
(WebCore::HTMLAnchorElement::setShouldBePrefetched): Indicates that an anchor should be prefetched.
(WebCore::HTMLAnchorElement::checkForSpeculationRules): Checks speculations rules and called setShouldBePrefetched.
* Source/WebCore/html/HTMLAnchorElement.h:
* Source/WebCore/html/HTMLScriptElement.h: Add "speculationrules" script type.
* Source/WebCore/loader/DocumentLoader.cpp:
(WebCore::DocumentLoader::setRequest):
(WebCore::DocumentLoader::loadMainResource):
* Source/WebCore/loader/DocumentPrefetcher.cpp: Handle document prefetching.
(WebCore::DocumentPrefetcher::DocumentPrefetcher):
(WebCore::DocumentPrefetcher::~DocumentPrefetcher):
(WebCore::isPassingSecurityChecks): Run security checks.
(WebCore::makePrefetchRequest): Request the prefetched document.
(WebCore::DocumentPrefetcher::prefetch): Prefetch the document if it passes all checks.
(WebCore::DocumentPrefetcher::responseReceived): Implement responseReceived to run the completion handler.
(WebCore::DocumentPrefetcher::redirectReceived): Handle redirect responses.
(WebCore::DocumentPrefetcher::notifyFinished): Handle the resource finish notification.
* Source/WebCore/loader/DocumentPrefetcher.h:
(WebCore::DocumentPrefetcher::create):
* Source/WebCore/loader/FrameLoader.cpp:
(WebCore::FrameLoader::FrameLoader): Initialize m_documentPrefetcher.
(WebCore::FrameLoader::commitProvisionalLoad):
(WebCore::FrameLoader::loadResourceSynchronously):
(WebCore::FrameLoader::continueLoadAfterNavigationPolicy): Match navigation with a prefetched resource.
(WebCore::FrameLoader::prefetch): Prefetch a document.
* Source/WebCore/loader/FrameLoader.h:
* Source/WebCore/loader/ResourceLoaderOptions.h:
* Source/WebCore/loader/SpeculationRules.cpp: Added.
(WebCore::SpeculationRules::create):
(WebCore::SpeculationRules::prefetchRules const):
(WebCore::SpeculationRules::DocumentPredicate::DocumentPredicate):
(WebCore::SpeculationRules::DocumentPredicate::value const):
(WebCore::parseStringOrStringList):
(WebCore::parseDocumentPredicate):
(WebCore::parseSingleRule):
(WebCore::parseRules):
(WebCore::SpeculationRules::parseSpeculationRules):
* Source/WebCore/loader/SpeculationRules.h: Added.
* Source/WebCore/loader/cache/CachedRawResource.cpp:
(WebCore::shouldIgnoreHeaderForCacheReuse):
* Source/WebCore/loader/cache/CachedResource.cpp:
(WebCore::CachedResource::CachedResource):
(WebCore::CachedResource::redirectReceived):
(WebCore::CachedResource::addClientToSet):
* Source/WebCore/loader/cache/CachedResource.h:
(WebCore::CachedResource::allowsCaching const):
* Source/WebCore/loader/cache/CachedResourceLoader.cpp:
(WebCore::CachedResourceLoader::allowedByContentSecurityPolicy const): Add MainResource as an option.
(WebCore::CachedResourceLoader::shouldUpdateCachedResourceWithCurrentRequest):
(WebCore::isResourceSuitableForDirectReuse):
(WebCore::CachedResourceLoader::updateCachedResourceWithCurrentRequest):
(WebCore::mustReloadFromServiceWorkerOptions):
(WebCore::CachedResourceLoader::determineRevalidationPolicy const):
* Source/WebCore/loader/cache/CachedResourceRequest.h:
(WebCore::CachedResourceRequest::allowsCaching const):
* Source/WebCore/page/PerformanceResourceTiming.cpp:
(WebCore::networkLoadTimeToDOMHighResTimeStamp):
* Source/WebCore/platform/ReferrerPolicy.cpp:
(WebCore::parseReferrerPolicy): Add SpeculationRules as a source for referrer policy.
* Source/WebCore/platform/ReferrerPolicy.h:
* Source/WebCore/platform/network/CacheValidation.cpp:
(WebCore::updateRedirectChainStatus):
* Source/WebCore/platform/network/CacheValidation.h:
* Source/WebCore/platform/network/HTTPHeaderNames.in: Add Sec-Speculation-Tags.
* Source/WebKitLegacy/mac/WebCoreSupport/WebFrameLoaderClient.mm:
(WebFrameLoaderClient::dispatchDidReceiveServerRedirectForProvisionalLoad):

Canonical link: https://commits.webkit.org/300829@main
@webkit-commit-queue

webkit-commit-queue commented Oct 1, 2025

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Committed 300829@main (a4a9e7f): https://commits.webkit.org/300829@main

Reviewed commits have been landed. Closing PR #48322 and removing active labels.

This was referenced Oct 2, 2025
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@yoavweiss yoavweiss mentioned this pull request Oct 14, 2025
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@achristensen07 achristensen07 achristensen07 approved these changes

@cdumez cdumez Awaiting requested review from cdumez cdumez is a code owner

@rniwa rniwa Awaiting requested review from rniwa rniwa is a code owner

@JonWBedard JonWBedard Awaiting requested review from JonWBedard

@gsnedders gsnedders Awaiting requested review from gsnedders

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@yoavweiss yoavweiss

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@yoavweiss @webkit-early-warning-system @webkit-ews-buildbot @webkit-commit-queue @achristensen07