⚡ Bolt: Optimize schedule filtering with Set lookup#232
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Convert the savedSessionIds array to a Set before performing lookups inside the filter loop to reduce time complexity from O(N*M) to O(N+M). Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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📝 WalkthroughWalkthrough
ChangesSession Filtering Performance
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Code Review
This pull request optimizes the session filtering logic in ScheduleContainer.tsx by converting the savedSessionIds array into a Set, which improves the lookup complexity from O(N) to O(1). The reviewer suggests further improving this by storing the IDs as a Set directly within the ScheduleContext to avoid recreating the Set on every render and to provide performance benefits to other components that consume this data.
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| const filterSessions = (sessions: GridSession[]) => sessions.filter((s) => savedSessionIds.includes(s.id) || s.isServiceSession); | ||
| const savedSessionIdsSet = new Set(savedSessionIds); |
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While this local optimization correctly reduces the filtering complexity from O(N*M) to O(N+M), consider storing savedSessionIds as a Set directly within the ScheduleContext. This would eliminate the need to recreate the Set on every re-render of this component and would also optimize the isSaved check (currently O(N) in the context) for all components consuming it, such as SessionCard.
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💡 What: Converted the
savedSessionIdsarray into aSetoutside of the session filtering loops inScheduleContainer.tsx.🎯 Why: The original code used
Array.includes()inside anArray.filter()method. This resulted in O(N*M) time complexity, where N is the number of saved sessions and M is the total number of sessions. Using aSetbrings the complexity down to O(N+M) becauseSet.has()has O(1) time complexity.📊 Impact: Reduces CPU time when re-rendering the schedule grid when a user clicks the "My Schedule" button, especially when many sessions are loaded or saved.
🔬 Measurement: Verify by rendering the schedule grid with a large mock dataset of
DailyScheduleentries and a large list ofsavedSessionIds, observing the time required to switch to "My Schedule" view.PR created automatically by Jules for task 4801011960425649429 started by @anyulled
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