⚡ Bolt: Optimized scroll performance and progress bar rendering#9
⚡ Bolt: Optimized scroll performance and progress bar rendering#9VagueDustin wants to merge 1 commit into
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- Throttled handleScroll with requestAnimationFrame. - Implemented direct DOM updates for the progress bar via ref to bypass React reconciliation. - Cached heading elements in a ref to avoid repeated querySelectorAll calls. - Minimized re-renders by moving non-rendered state (filePath) to a ref and optimizing activeHeading state updates. - Fixed ESLint issues related to unused variables and control characters in regex. Co-authored-by: VagueDustin <127912586+VagueDustin@users.noreply.github.com>
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💡 What: Optimized the scroll handler and progress bar rendering in
App.jsx.🎯 Why: High-frequency scroll events were causing excessive React re-renders and expensive DOM queries (
querySelectorAll), leading to UI jank and high CPU usage.📊 Impact: Significantly reduces the number of component re-renders during scrolling and eliminates repeated DOM searches. The progress bar now updates at the display's refresh rate without triggering React's reconciliation.
🔬 Measurement: Verify by scrolling a long document; the progress bar and Table of Contents highlighting remain smooth and responsive. Use React DevTools to confirm reduced re-render count.
PR created automatically by Jules for task 3233771453083711615 started by @VagueDustin