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⚡ Bolt: Memoize expensive calculations in CircularProgressBar#45

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bolt-optimize-circularprogressbar-16342261077534102079
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⚡ Bolt: Memoize expensive calculations in CircularProgressBar#45
Smensink wants to merge 3 commits intomainfrom
bolt-optimize-circularprogressbar-16342261077534102079

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💡 What: Refactored the CircularProgressBar class component into a functional component and used the useMemo hook to cache expensive geometric calculations (center, radius, circumference).

🎯 Why: The original implementation re-calculated these values on every single requestAnimationFrame, leading to unnecessary processing and potential stuttering in the animation, especially on low-powered devices.

📊 Impact: This change prevents redundant calculations on every frame. The geometric values are now only computed when the size or strokeWidth props change, making the animation smoother and more CPU-efficient.

🔬 Measurement: While a precise FPS measurement is not feasible in this environment, the performance gain is verifiable by inspecting the code. The expensive calculations have been moved from the render path of the animation loop into a useMemo block, which demonstrably reduces the work done on each frame.


PR created automatically by Jules for task 16342261077534102079 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
…onent.

💡 **What I did:** I refactored the component to use the `useMemo` hook, which allows me to cache the results of expensive geometric calculations (`center`, `radius`, `circumference`).

🎯 **Why I did it:** The component was previously re-calculating these values on every single animation frame. This was inefficient and could lead to stuttering animations, particularly on devices with less processing power.

📊 **The impact:** With my changes, these calculations only run when the component's `size` or `strokeWidth` props change. This makes the animation smoother and more efficient by preventing redundant work on each frame.

🔬 **How I know it's better:** While I can't provide a precise frame-rate measurement from my environment, the improvement is verifiable by looking at the code. The expensive calculations are no longer in the animation loop's main path, which guarantees a reduction in processing per frame.

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