Fix dynamic groups carousel bug #4863
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WalkthroughThe pull request introduces performance optimizations to the Changes
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Actionable comments posted: 3
🧹 Outside diff range and nitpick comments (3)
app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupsFlashlightWrapper.tsx (1)
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51-177: Approved: Effective use of hooks and Flashlight managementThe component's structure and use of hooks are well-implemented:
- Custom hooks and Recoil selectors are used effectively to manage state and derive values.
- The Flashlight instance is created once and stored in state, which is good for performance.
- useLayoutEffect and useEffect hooks are used appropriately to manage the Flashlight instance lifecycle and updates.
One minor suggestion for consistency:
Consider using the functional update form of
useStatefor theflashlightstate to ensure you're always working with the most current state:- const [flashlight] = useState(() => { + const [flashlight] = useState(() => () => { const flashlight = new Flashlight({ // ... existing configuration }); return flashlight; });This change ensures that the Flashlight instance is created only once, even if the component re-renders before the state is set.
app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx (2)
11-11: Evaluate the necessity ofReact.memofor this componentWrapping
DynamicGroupCarouselwithReact.memois intended to prevent unnecessary re-renders when the component's props remain the same. However, since this component does not receive any props and relies on internal state and Recoil values,React.memomight not provide significant performance benefits. Consider whether memoization is necessary in this case.
20-29: Address the TODO and eliminate the hackThe comment block indicates a temporary workaround labeled as a "BIG HACK" and a "TODO: FIX ME". Relying on such hacks can lead to maintenance issues and unexpected behavior. It's important to find a robust solution to ensure that the flashlight re-renders correctly when
groupByFieldchanges.Would you like assistance in refactoring this code to remove the hack? I can help devise a solution that avoids the need for this workaround or open a new GitHub issue to track this task.
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📒 Files selected for processing (2)
- app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx (3 hunks)
- app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupsFlashlightWrapper.tsx (3 hunks)
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app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx (1)
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**/*.{ts,tsx}: Review the Typescript and React code for conformity with best practices in React, Recoil, Graphql, and Typescript. Highlight any deviations.app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupsFlashlightWrapper.tsx (1)
Pattern
**/*.{ts,tsx}: Review the Typescript and React code for conformity with best practices in React, Recoil, Graphql, and Typescript. Highlight any deviations.
🔇 Additional comments (2)
app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupsFlashlightWrapper.tsx (2)
6-6: Approved: Performance optimization with React.memoThe changes to the import statement and component declaration are beneficial:
- The import on line 6 now explicitly includes all the React hooks used in the component, improving code readability.
- Wrapping the component with
React.memoon line 49 is a good optimization. It can prevent unnecessary re-renders when the component's props haven't changed, potentially improving performance in scenarios where this component is frequently re-rendered with the same props.Also applies to: 49-49
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136-177: Consider optimizing hook dependencies and effect usageWhile the current implementation works, there are a few areas where we could potentially improve performance and readability:
- Hook dependencies:
TheupdateItemcallback and someuseLayoutEffecthooks have many dependencies. Consider memoizing some of these values or moving them into custom hooks to reduce the number of dependencies.For example, you could memoize the
optsobject:const memoizedOpts = useMemo(() => ({ ...opts, selected: selected.has(id), highlight: highlight(store.samples.get(id)!.sample as Sample), }), [opts, selected, highlight, store.samples]); const updateItem = useCallback( async (id: string) => { store.lookers.get(id)?.updateOptions(memoizedOpts); }, [memoizedOpts, store.lookers] );
- Effect usage:
The component uses bothuseLayoutEffectanduseEffectfor similar operations. While this isn't necessarily wrong, it might be worth reviewing if all of these need to beuseLayoutEffector if some could be changed touseEffectfor better performance.To ensure that changing some
useLayoutEffecttouseEffectwon't cause visual issues, you can run the following script:This will help identify if there are any comments or surrounding code that indicate why
useLayoutEffectwas specifically chosen for Flashlight-related updates.
app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx
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app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx
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app/packages/core/src/components/Modal/Group/DynamicGroup/carousel/DynamicGroupCarousel.tsx
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What changes are proposed in this pull request?
Fixes bug where carousel wasn't updating when navigating between samples
How is this patch tested? If it is not, please explain why.
Locally
Summary by CodeRabbit
New Features
DynamicGroupCarouselandDynamicGroupsFlashlightWrappercomponents through memoization.Bug Fixes
DynamicGroupsFlashlightWrapperby preventing unnecessary updates.These changes aim to provide a smoother user experience by optimizing component rendering and responsiveness.