Optimize TreeView typeahead with startTransition to prevent input lag#7410
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Optimize TreeView typeahead with startTransition to prevent input lag#7410
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🦋 Changeset detectedLatest commit: c6e48c4 The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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Co-authored-by: mattcosta7 <8616962+mattcosta7@users.noreply.github.com>
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[WIP] Optimize typeahead functionality in TreeView component
Optimize TreeView typeahead with startTransition to prevent input lag
Jan 2, 2026
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👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the |
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Co-authored-by: mattcosta7 <8616962+mattcosta7@users.noreply.github.com>
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TreeView typeahead blocks the main thread on every keystroke when searching large trees (thousands of items). Each keypress synchronously iterates all tree items, calling
getAccessibleName()for string matching.Wrapped the expensive search operation in
startTransitionto mark it as low-priority, keeping keystroke handling responsive while deferring the focus search.Changelog
Changed
startTransitionfor search operations, improving responsiveness on large treesRollout strategy
Behavioral change is transparent to users - only affects internal update scheduling.
Testing & Reviewing
All existing typeahead tests continue to pass. Test manually by typing rapidly in a TreeView with 1000+ items - keystrokes should no longer lag.
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