Description

The Speculation Rules API is designed to improve performance for future navigations. It targets document URLs rather than specific resource files, and so makes sense for multi-page applications (MPAs) rather than single-page applications (SPAs).

The Speculation Rules API provides an alternative to the widely-available feature. It provides many improvements over these technologies, along with a more expressive, configurable syntax for specifying which documents should be prefetched or prerendered.

Specification

https://wicg.github.io/nav-speculation/speculation-rules.html

Additional Signals

Webkit: WebKit/standards-positions#54
Mozilla: mozilla/standards-positions#620

Tests:
https://wpt.fyi/results/speculation-rules?label=master&label=experimental&aligned&q=speculation

Info about:

• https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API
• https://developer.chrome.com/blog/speculation-rules-improvements