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⚡ Bolt: Optimize CircularProgressBar Component with useMemo#33

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bolt-optimize-circular-progress-bar-11546246267085453452
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⚡ Bolt: Optimize CircularProgressBar Component with useMemo#33
google-labs-jules[bot] wants to merge 3 commits intomainfrom
bolt-optimize-circular-progress-bar-11546246267085453452

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This change refactors the CircularProgressBar component to improve performance. It converts the component from a class to a functional component and uses the useMemo hook to cache expensive calculations that were previously running on every animation frame. It also optimizes the useEffect hook that drives the animation to be more efficient.


PR created automatically by Jules for task 11546246267085453452 started by @Smensink

google-labs-jules bot and others added 3 commits December 11, 2025 10:43
Wrapped the StarRating functional component in React.memo to prevent unnecessary re-renders.

This optimization is targeted at its usage within list components like BookRow, where parent state changes would previously cause every StarRating instance to re-render, even if its props were unchanged.

This improves UI performance by reducing the number of wasted render cycles.
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⚡ Bolt: Memoize StarRating component to prevent re-renders
💡 What:
Refactored the class-based CircularProgressBar component into a functional component and memoized expensive SVG geometry calculations using the `useMemo` hook. Also optimized the animation loop's `useEffect` hook to prevent it from re-running on every frame.

🎯 Why:
The original component recalculated properties like radius and circumference on every single animation frame, leading to unnecessary computational overhead. While minor, this is an inefficient pattern that can degrade performance, especially on low-powered devices.

📊 Impact:
- Reduces redundant calculations within the animation loop by caching SVG geometry.
- Prevents the `useEffect` hook from re-running unnecessarily on every frame.
- Improves overall component efficiency and adheres to React best practices.

🔬 Measurement:
The improvement can be verified by observing that the memoized calculations (for `center`, `radius`, `circumference`) are no longer executed on every re-render triggered by the `requestAnimationFrame` loop. This avoids unnecessary work on each frame, making the animation smoother and more efficient.
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