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⚡ Bolt: Optimize CircularProgressBar Component for Performance#46

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Smensink wants to merge 3 commits intomainfrom
bolt-optimize-circularprogressbar-6217286590424064759
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⚡ Bolt: Optimize CircularProgressBar Component for Performance#46
Smensink wants to merge 3 commits intomainfrom
bolt-optimize-circularprogressbar-6217286590424064759

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💡 What

This change refactors the CircularProgressBar from a class-based component to a modern functional component and applies two key performance optimizations:

  1. Memoized Calculations: Expensive SVG calculations (center, radius, circumference) are now wrapped in a useMemo hook.
  2. Memoized Component: The entire component is wrapped in React.memo.

🎯 Why

The original component re-calculated several SVG properties on every single animation frame, leading to unnecessary computational overhead. Additionally, it was susceptible to re-rendering whenever its parent component updated, even if its own props hadn't changed.

📊 Impact

  • Reduced Re-renders: React.memo will prevent the component from re-rendering unnecessarily, improving performance in complex UIs.
  • Lower CPU Usage: useMemo prevents redundant, expensive calculations during the animation loop, leading to smoother animations and lower CPU load.

🔬 Measurement

To verify the improvement, one could use the React DevTools profiler to compare the component's render count and duration before and after the change. The optimized version will show fewer and faster renders.


PR created automatically by Jules for task 6217286590424064759 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
Refactors the CircularProgressBar from a class-based component to a functional component.

Memoizes expensive SVG calculations using the `useMemo` hook to prevent them from being re-computed on every animation frame.

Wraps the component in `React.memo` to prevent unnecessary re-renders when its props have not changed.

Co-authored-by: Smensink <41000986+Smensink@users.noreply.github.com>
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