Performance Review

When reviewing code for performance:

1. Check database queries: any N+1 patterns? Missing indexes on queried columns? Unbounded result sets?
2. Check loops: any expensive operations inside loops that could be batched or hoisted?
3. Check frontend: any unnecessary re-renders? Large components that should be split or memoized?
4. Check bundle impact: does a new dependency significantly increase the bundle size?
5. Check async operations: any blocking I/O? Sequential awaits that could be parallelized with Promise.all?
6. Check data fetching: is pagination used for lists? Are responses cached where appropriate?
7. If concerned about a specific path, measure it before and after the change.