Fix perf issue for InstallAnotherVersionAction#136992
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sandy081 merged 5 commits intomicrosoft:mainfrom Jan 18, 2022
TwitchBronBron:faster-extension-version-picker
Merged
Fix perf issue for InstallAnotherVersionAction#136992sandy081 merged 5 commits intomicrosoft:mainfrom TwitchBronBron:faster-extension-version-picker
sandy081 merged 5 commits intomicrosoft:mainfrom
TwitchBronBron:faster-extension-version-picker
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iObject
approved these changes
Nov 16, 2021
axetroy
reviewed
Nov 28, 2021
| return result; | ||
| const seenVersions = new Set<string>(); | ||
| // Run checks in parallel to reduce wait time (fixes slow performance related to extensions with ownership changes) | ||
| const result = await Promise.all( |
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@axetroy I'm a new contributor to vscode. What's vscode's policy on adding more npm packages? I'd be happy to add this if it's a normal thing to do, as that does look like a nice package that will help manage the number of "concurrent" threads.
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@sandy081 is there anything I can do to help keep this moving? |
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I will take a look at it and get back to you. Thanks. |
sandy081
approved these changes
Jan 18, 2022
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This PR fixes #140525
There's a significant performance issue with the "Install another version" dropdown in the extensions panel, but it only affects extensions that have undergone an ownership change. For example, this extension that I maintain used to be published under the publisher name "celsoaf", but is now published under the publisher name "rokucommunity". (I worked with vsmarketplace team to migrate the extension to a new publisher name without losing all our stats and information).
The issue is caused by certain artifacts on the server no longer existing (or using the wrong URLs, not sure which), resulting in very slow (300-500ms) 403 and 404 http responses from the server. This drastically slows down the process of gathering all version information since that process is run sequentially here. Ideally the vsmarketplace team could speed up their 403 and 404 error response times or include additional version metadata so vscode doesn't need to run an HTTP query for every version. However, I have created a fix that seems to work around the issue.
To mitigate the performance issues, rather than running the queries one at a time, we instead run them all at the same time. Consider the results:
Before my fix: 57 seconds
After my fix: 1 second