⚡ Bolt: Optimize schedule filtering#180
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Replaces O(N) Array.includes() with O(1) Set.has() during the schedule filtering operation to improve performance. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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📝 WalkthroughWalkthroughThe session filtering logic in Changes
Estimated code review effort🎯 1 (Trivial) | ⏱️ ~3 minutes Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Code Review
This pull request optimizes session filtering in ScheduleContainer.tsx by converting savedSessionIds to a Set to achieve O(1) lookup performance. Feedback suggests a further architectural improvement by storing savedSessionIds as a Set directly within the ScheduleContext to eliminate redundant conversions and optimize lookups globally.
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| const filterSessions = (sessions: GridSession[]) => sessions.filter((s) => savedSessionIds.includes(s.id) || s.isServiceSession); | ||
| // Convert savedSessionIds to a Set to improve lookup performance from O(N) to O(1) | ||
| const savedIdsSet = new Set(savedSessionIds); |
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While converting the array to a Set here successfully improves the filtering performance from O(N*M) to O(N+M), this conversion still occurs every time the useMemo for filteredSchedule is re-evaluated (e.g., when initialSchedule changes or when showSavedOnly is toggled).
For a more robust architectural improvement, consider storing savedSessionIds as a Set directly within the ScheduleContext. This would eliminate the need for local conversion and also optimize the isSaved check in the context, which currently uses Array.prototype.includes() (O(M) complexity). This would provide O(1) lookups throughout the application without repeated overhead.
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🧹 Nitpick comments (1)
components/schedule/ScheduleContainer.tsx (1)
23-23: Tighten the inline comment to explain only the decision rationaleThis comment mixes what and why; prefer keeping only the rationale (e.g., avoiding repeated linear lookups during filtering) to match repo comment conventions.
As per coding guidelines, "Code must be self-documenting. Only explain why non-obvious decisions were made in comments. DO NOT add inline comments explaining what code does."
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@components/schedule/ScheduleContainer.tsx` at line 23, Tighten the inline comment that currently reads "Convert savedSessionIds to a Set to improve lookup performance from O(N) to O(1)" to only state the rationale: explain that savedSessionIds is converted to a Set to avoid repeated linear lookups during filtering (improves lookup complexity), and remove the "what" portion; update the comment adjacent to the savedSessionIds conversion/Set instantiation in ScheduleContainer (where savedSessionIds is used for filtering).
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@components/schedule/ScheduleContainer.tsx`:
- Line 23: Tighten the inline comment that currently reads "Convert
savedSessionIds to a Set to improve lookup performance from O(N) to O(1)" to
only state the rationale: explain that savedSessionIds is converted to a Set to
avoid repeated linear lookups during filtering (improves lookup complexity), and
remove the "what" portion; update the comment adjacent to the savedSessionIds
conversion/Set instantiation in ScheduleContainer (where savedSessionIds is used
for filtering).
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: 8041b204-ea37-4a41-b76d-bc5a101dc958
📒 Files selected for processing (1)
components/schedule/ScheduleContainer.tsx
1 participant
💡 What:
Replaced
Array.prototype.includes()withSet.prototype.has()when filtering user-saved schedule sessions.🎯 Why:
The
Array.includes()call inside a.filter()loop resulted in an O(N*M) time complexity operation, which is inefficient. By pre-computing aSet, the lookup becomes O(1), improving the overall filtering complexity to O(N+M).📊 Impact:
Reduces the time complexity of schedule filtering, eliminating an O(N*M) loop inside a React
useMemohook, leading to faster re-renders when toggling the "My Schedule" filter.🔬 Measurement:
Run
npm run testand check the schedule component tests. Verify functionality by visiting the schedule page and toggling the "My Schedule" view with saved sessions.PR created automatically by Jules for task 15198418608409947990 started by @anyulled
Summary by CodeRabbit