Coming from here
Background
The useOnyx hook allows components to subscribe to data using a selector function.
Problem
When a component using useOnyx with a selector re-renders for any reason, it causes the getSnapshot function to perform an expensive deep equality comparison on the selector’s result, which prevents us from achieving optimal rendering performance in complex applications.
Solution
Add an internal, memoized selector to the useOnyx hook. This will perform the expensive deep equality check only when the source Onyx data changes, and will return a stable, cached object reference if the selected value is identical. This allows the main hook to use a much faster reference (===) check on every render, eliminating the performance bottleneck.
useOnyx times when opening an expense chat (Jason account):
- Before: ~1s
- After: ~250ms
Upwork Automation - Do Not Edit
- Upwork Job URL: https://www.upwork.com/jobs/~021948745747705293799
- Upwork Job ID: 1948745747705293799
- Last Price Increase: 2025-07-25
Issue Owner
Current Issue Owner: @zanyrenneyIssue Owner
Current Issue Owner: @TMisiukiewicz
Coming from here
Background
The useOnyx hook allows components to subscribe to data using a selector function.
Problem
When a component using useOnyx with a selector re-renders for any reason, it causes the getSnapshot function to perform an expensive deep equality comparison on the selector’s result, which prevents us from achieving optimal rendering performance in complex applications.
Solution
Add an internal, memoized selector to the useOnyx hook. This will perform the expensive deep equality check only when the source Onyx data changes, and will return a stable, cached object reference if the selected value is identical. This allows the main hook to use a much faster reference (===) check on every render, eliminating the performance bottleneck.
useOnyx times when opening an expense chat (Jason account):
Upwork Automation - Do Not Edit
Issue Owner
Current Issue Owner: @zanyrenneyIssue Owner
Current Issue Owner: @TMisiukiewicz