perf(Autocomplete): Split context to reduce unnecessary re-renders #7337
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Split AutocompleteContext into separate contexts for static values, setters, and dynamic state. Components now subscribe only to the context slices they need, reducing re-renders. Part of #7312
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Pull request overview
This PR optimizes Autocomplete component performance by splitting a monolithic context into three specialized contexts, reducing unnecessary re-renders during user typing. The changes prevent cascading re-renders where components were updating on every keystroke even when they didn't need the input value.
Key changes:
- Split
AutocompleteContextinto three contexts:AutocompleteContext(stable values),AutocompleteInputContext(keystroke values), andAutocompleteDeferredInputContext(deferred filtering) - Updated
AutocompleteInputandAutocompleteMenuto consume only the context slices they need - Implemented
useDeferredValuefor filtering operations to prevent blocking keystrokes
Reviewed changes
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Show a summary per file
| File | Description |
|---|---|
packages/react/src/Autocomplete/AutocompleteContext.tsx |
Defines three separate contexts replacing the original monolithic context |
packages/react/src/Autocomplete/Autocomplete.tsx |
Provides memoized values for all three contexts with proper dependency arrays |
packages/react/src/Autocomplete/AutocompleteInput.tsx |
Consumes AutocompleteContext and AutocompleteInputContext for immediate input needs |
packages/react/src/Autocomplete/AutocompleteMenu.tsx |
Consumes AutocompleteContext and AutocompleteDeferredInputContext for filtering without blocking keystrokes |
.changeset/perf-autocomplete-context-split.md |
Documents the performance optimization in the changelog |
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👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/8883 |
Summary
Performance optimizations for Autocomplete to improve INP by reducing unnecessary re-renders.
Changes
Split AutocompleteContext into separate contexts:
Components now subscribe only to the context slices they need.
Expected INP Impact
Why this matters
When all context values are in a single context object, any change causes all consumers to re-render:
By splitting contexts, each component only re-renders when its specific data changes.
Part of the INP performance optimization effort. See #7312 for full context.