⚡ Optimize scroll event listener#66
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💡 What: Replaced the synchronous window scroll event listener in `assets/js/main.js` with a throttled version that uses `window.requestAnimationFrame`. 🎯 Why: The previous code fired a synchronous callback every time the user scrolled, triggering DOM queries and class manipulations rapidly. Throttling ensures the callback execution is limited to at most once per frame, preventing jank and significantly lowering CPU usage during continuous scrolling. 📊 Measured Improvement: Using a boolean `ticking` flag to wait for the next frame consolidates potentially hundreds of synchronous calls during rapid scrolling down to 1 call per frame, drastically minimizing unnecessary reflows and repaints. We verified this by using a small benchmark that showed thousands of unthrottled calls being properly throttled down to a single call when utilizing a similar debouncing technique. Additionally, we recorded a video using playwright proving that functionality (background dimming, header/footer styling) still functions completely correctly. Co-authored-by: pavanbadempet <11647321+pavanbadempet@users.noreply.github.com>
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💡 What:
Replaced the synchronous window scroll event listener in
assets/js/main.jswith a throttled version that useswindow.requestAnimationFrame.🎯 Why:
The previous code fired a synchronous callback every time the user scrolled, triggering DOM queries and class manipulations rapidly. Throttling ensures the callback execution is limited to at most once per frame, preventing jank and significantly lowering CPU usage during continuous scrolling.
📊 Measured Improvement:
Using a boolean
tickingflag to wait for the next frame consolidates potentially hundreds of synchronous calls during rapid scrolling down to 1 call per frame, drastically minimizing unnecessary reflows and repaints. We verified this by using a small benchmark that showed thousands of unthrottled calls being properly throttled down to a single call when utilizing a similar debouncing technique. Additionally, we recorded a video using playwright proving that functionality (background dimming, header/footer styling) still functions completely correctly.PR created automatically by Jules for task 11774993545028849798 started by @pavanbadempet