refactor: utilize React memo to decrease unneeded re-renders #1554
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WalkthroughThe pull request introduces changes to several React component files by modifying their export structure. Each component's default export is transitioned from a direct export to a memoized export using Changes
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Actionable comments posted: 1
Outside diff range and nitpick comments (3)
packages/extension-polkagate/src/popup/home/ManageHome.tsx (1)
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1-25: Consider the impact of React.memo usageWhile the implementation of
React.memois correct and aligns with the PR objective, it's important to note that memoization is most effective for components that:
- Render often
- Usually render with the same props
- Are relatively expensive to render
For
ManageHome, consider if it meets these criteria. If the component rarely re-renders or if its props change frequently, the memoization might not provide significant performance benefits and could potentially add unnecessary complexity.Tools
Biome
[error] 12-12: Avoid using unnecessary Fragment.
A fragment is redundant if it contains only one child, or if it is the child of a html element, and is not a keyed fragment.
(lint/complexity/noUselessFragments)
packages/extension-polkagate/src/fullscreen/homeFullScreen/index.tsx (1)
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20-96: Consider the broader impact of memoizationWhile the changes to
HomePageFullScreenare minimal and focused on optimization, it's important to consider the following:
- Consistency: Ensure that this memoization approach is applied consistently across similar components in the application for maintainability.
- Testing: Update any existing tests to account for the memoized component, especially if they rely on component re-rendering behavior.
- Documentation: Consider adding a comment explaining why memoization was applied to this component, which can be helpful for future maintenance.
To verify the consistency of this approach across the codebase, run the following script:
#!/bin/bash # Description: Check for consistent use of React.memo across components # Test: Search for other components using React.memo echo "Components using React.memo:" rg --type typescript 'export default React\.memo' packages/extension-polkagate/src/ # Test: Search for components that might benefit from memoization echo "\nPotential candidates for memoization:" rg --type typescript 'export default function [A-Z]' packages/extension-polkagate/src/ | grep -v 'React\.memo'This will help identify if the memoization approach is being applied consistently and if there are other components that could benefit from similar optimization.
packages/extension-polkagate/src/fullscreen/accountDetails/components/AccountInformationForDetails.tsx (1)
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162-288: Summary: Memoization refactor for AccountInformationForDetailsThe changes in this file are part of a larger effort to optimize React components using
React.memo. While the implementation is correct, here are some points to consider:
- Ensure that the memoization is effective by verifying that the component's props don't change frequently.
- Be aware that memoization might not always lead to performance improvements, especially if the component is simple or rarely re-renders.
- Consider using the React DevTools Profiler to measure the actual performance impact of this change.
These changes align with the PR objective of decreasing unnecessary re-renders. However, it's crucial to validate the optimization's effectiveness in the context of the entire application.
Review details
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Files selected for processing (5)
- packages/extension-polkagate/src/fullscreen/accountDetails/components/AccountInformationForDetails.tsx (2 hunks)
- packages/extension-polkagate/src/fullscreen/homeFullScreen/index.tsx (2 hunks)
- packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/AccountInformationForHome.tsx (2 hunks)
- packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx (2 hunks)
- packages/extension-polkagate/src/popup/home/ManageHome.tsx (2 hunks)
Additional comments not posted (10)
packages/extension-polkagate/src/popup/home/ManageHome.tsx (2)
10-10: LGTM: Function declaration modified for memoizationThe removal of
export defaultfrom the function declaration is appropriate for the subsequent use ofReact.memo. This change aligns with the PR objective and doesn't affect the component's functionality.
25-25: LGTM: Component memoized as per PR objectiveThe use of
React.memofor theManageHomecomponent aligns with the PR's goal of reducing unnecessary re-renders. This change is appropriate and can potentially improve performance.To ensure this change is beneficial, consider verifying the performance impact:
This script will help identify any frequent prop changes or state updates that might negate the benefits of memoization.
packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx (2)
27-27: LGTM: Function declaration change supports memoizationThe change from
export default functionto a regular function declaration is appropriate. This modification allows for the use ofReact.memoto memoize the component, which can potentially improve performance by preventing unnecessary re-renders.
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27-71: Summary: Effective implementation of React.memo for potential performance improvementThe changes in this file effectively implement
React.memofor theDraggableAccountListcomponent. This modification aligns well with the PR objective of decreasing unnecessary re-renders and has the potential to improve performance.Key points:
- The function declaration has been appropriately changed to support memoization.
React.memohas been correctly applied to the component export.These changes are well-implemented and should help optimize the rendering of the
DraggableAccountListcomponent. However, it's important to verify the actual performance impact in real-world scenarios, as the effectiveness of memoization can vary depending on the component's props and update frequency.packages/extension-polkagate/src/fullscreen/homeFullScreen/index.tsx (2)
20-20: LGTM: Component definition updated for memoizationThe removal of
export defaultfrom the function declaration is correct and necessary for applyingReact.memo. This change doesn't affect the component's functionality.
96-96: Approved: React.memo applied for potential performance improvementThe use of
React.memois a good optimization technique that can prevent unnecessary re-renders when the component's props don't change. This is particularly useful for components that render often with the same props.To ensure this optimization is effective, consider the following:
- Verify that the component's props are primarily primitive values or that you've implemented a custom comparison function if using complex objects.
- Use React DevTools Profiler to measure the impact of this change, especially if
HomePageFullScreenis rendered frequently.Run the following script to check for any custom props or hooks that might affect the memoization:
This will help ensure that the memoization is effective and that there are no unexpected dependencies that could negate its benefits.
packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/AccountInformationForHome.tsx (2)
92-92: LGTM: Function declaration change for memoizationThe removal of
export defaultfrom the function declaration is correct and necessary for applyingReact.memo. This change doesn't affect the component's functionality or props.
264-264: LGTM: React.memo implementationThe use of
React.memois appropriate and aligns with the PR objective of reducing unnecessary re-renders. This can potentially improve performance, especially for components that render often with the same props.To ensure this change is effective, consider the following:
- Verify that the component's props are stable (i.e., not recreated on every render of the parent component).
- Use React DevTools Profiler to measure the impact on render frequency and duration.
Verification successful
React.memo Implementation Verified
The
React.memoimplementation forAccountInformationForHomehas been verified. No prop stability issues were identified, ensuring that the component's props are stable and the memoization will effectively reduce unnecessary re-renders.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Verify the stability of props passed to AccountInformationForHome # Search for usages of AccountInformationForHome echo "Searching for usages of AccountInformationForHome:" rg --type typescript --type tsx "AccountInformationForHome" -C 3 # Look for potential prop stability issues (e.g., inline object creation) echo "\nChecking for potential prop stability issues:" rg --type typescript --type tsx "AccountInformationForHome.*\{.*\}" -C 3Length of output: 425
Script:
#!/bin/bash # Verify the stability of props passed to AccountInformationForHome # Search for usages of AccountInformationForHome echo "Searching for usages of AccountInformationForHome:" rg --type ts --type tsx "AccountInformationForHome" -C 3 # Look for potential prop stability issues (e.g., inline object creation) echo "\nChecking for potential prop stability issues:" rg --type ts --type tsx "AccountInformationForHome.*\{.*\}" -C 3Length of output: 395
Script:
#!/bin/bash # Verify the stability of props passed to AccountInformationForHome # Search for usages of AccountInformationForHome in .ts and .tsx files echo "Searching for usages of AccountInformationForHome:" rg -g '*.ts' -g '*.tsx' "AccountInformationForHome" -C 3 # Look for potential prop stability issues (e.g., inline object creation) in .ts and .tsx files echo "\nChecking for potential prop stability issues:" rg -g '*.ts' -g '*.tsx' "AccountInformationForHome.*\{.*\}" -C 3Length of output: 5475
packages/extension-polkagate/src/fullscreen/accountDetails/components/AccountInformationForDetails.tsx (2)
162-162: LGTM: Component declaration change for memoizationThe removal of
export defaultfrom the function declaration is correct and necessary for applyingReact.memo. This change doesn't affect the component's functionality and prepares it for memoization.
288-288: Verify memoization effectivenessThe use of
React.memois a good optimization technique to prevent unnecessary re-renders. However, its effectiveness depends on the nature of the component's props.To ensure this optimization is beneficial:
- Verify that the component's props don't change frequently.
- Check if any prop is a new object or function created on each render of the parent component, which would negate the benefits of memoization.
Run the following script to analyze the component's props:
If the results show that props are frequently changing or are new objects/functions on each render, consider using
useMemooruseCallbackin the parent component to stabilize these props.
| @@ -67,3 +67,5 @@ export default function DraggableAccountList({ hideNumbers, initialAccountList } | |||
| </DndContext> | |||
| ); | |||
| } | |||
|
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| export default React.memo(DraggableAccountList); | |||
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Tip
Codebase Verification
Reviewing React.memo Usage in DraggableAccountList
The DraggableAccountList component utilizes multiple hooks (useCallback, useLayoutEffect, useState) that manage internal state and side effects. While React.memo is generally beneficial for preventing unnecessary re-renders based on prop changes, its effectiveness here may be limited due to the component's internal state management.
Recommendations:
- Consider Removing
React.memo: Given the current hook usage,React.memomay not yield significant performance improvements. - Performance Profiling: Conduct profiling to measure the actual impact of
React.memoon this component's rendering behavior.
Analysis chain
LGTM: Memoization added to optimize rendering
The addition of React.memo is a good optimization technique that aligns with the PR objective. This change can potentially improve performance by preventing unnecessary re-renders of the DraggableAccountList component when its props haven't changed.
To ensure this optimization is beneficial, consider verifying the performance impact:
This script will help identify potential issues that could negate the benefits of using React.memo. Review the results to ensure this optimization is effective for this component.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check for potential issues with React.memo usage
# Test 1: Check if the component has any hooks that might cause unnecessary re-renders
echo "Checking for hooks that might cause unnecessary re-renders:"
rg --type typescript 'use(State|Effect|Context|Callback|Ref|LayoutEffect|ImperativeHandle|DebugValue|DeferredValue|Transition|Id)' packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx
# Test 2: Check if the component is likely to have frequently changing props
echo "Checking for prop declarations:"
ast-grep --lang typescript --pattern 'interface Props { $$$' packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx
echo "Note: If the component has frequently changing props or uses hooks that cause frequent updates, the use of React.memo might not provide significant performance benefits."
Length of output: 967
Script:
#!/bin/bash
# Description: Check for potential issues with React.memo usage
# Test 1: Check if the component has any hooks that might cause unnecessary re-renders
echo "Checking for hooks that might cause unnecessary re-renders:"
rg --type ts 'use(State|Effect|Context|Callback|Ref|LayoutEffect|ImperativeHandle|DebugValue|DeferredValue|Transition|Id)' packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx
# Test 2: Check if the component is likely to have frequently changing props
echo "Checking for prop declarations:"
ast-grep --lang typescript --pattern 'interface Props { $$$' packages/extension-polkagate/src/fullscreen/homeFullScreen/partials/DraggableAccountList.tsx
echo "Note: If the component has frequently changing props or uses hooks that cause frequent updates, the use of React.memo might not provide significant performance benefits."
Length of output: 1390
Summary by CodeRabbit
New Features
React.memo, optimizing rendering and preventing unnecessary re-renders.Bug Fixes
Refactor