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⚡ Bolt: Memoize CircularProgressBar calculations#44

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bolt-optimize-circular-progress-bar-799674508828385785
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⚡ Bolt: Memoize CircularProgressBar calculations#44
Smensink wants to merge 3 commits intomainfrom
bolt-optimize-circular-progress-bar-799674508828385785

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💡 What: Refactored the CircularProgressBar from a class component to a functional component and memoized expensive geometric calculations using the useMemo hook.

🎯 Why: The original component recalculated center, radius, and circumference on every requestAnimationFrame, causing unnecessary CPU work. This is inefficient, especially when multiple progress bars are animating at once.

📊 Impact: This change prevents redundant calculations on every render. The geometric values are now only computed when the size or strokeWidth props change. This leads to a smoother animation, lower CPU usage, and a more efficient component.

🔬 Measurement: To verify, observe the component's behavior in the UI. The animation should be visually identical to the original. A performance profiler would show a reduction in computation time within the component's render cycle during animation.


PR created automatically by Jules for task 799674508828385785 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 `CircularProgressBar` from a class component to a functional component and memoized expensive geometric calculations using the `useMemo` hook.

🎯 Why: The original component recalculated `center`, `radius`, and `circumference` on every `requestAnimationFrame`, causing unnecessary CPU work. This is inefficient, especially when multiple progress bars are animating at once.

📊 Impact: This change prevents redundant calculations on every render. The geometric values are now only computed when the `size` or `strokeWidth` props change. This leads to a smoother animation, lower CPU usage, and a more efficient component.

🔬 Measurement: To verify, observe the component's behavior in the UI. The animation should be visually identical to the original. A performance profiler would show a reduction in computation time within the component's render cycle during animation.

Co-authored-by: Smensink <[email protected]>
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