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Replaces layout-inducing `width` animation with GPU-accelerated `transform: scaleX(...)` for the `.scroll-progress` bar in both `script.js` and `styles.css`. This avoids triggering reflow operations on every scroll event and ensures smooth compositor-driven updates.
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💡 What: Replaced the
widthproperty transition on.scroll-progresswithtransform: scaleX(progress)to animate the element. Updated CSS andscript.jsaccordingly. Added comments to document the optimization.🎯 Why: Animating
widthtriggers costly layout recalculations (reflows) on every scroll frame. Switching to atransformoffloads the work to the GPU via compositing, significantly reducing main thread overhead and preventing layout thrashing.📊 Impact: Expected to reduce CPU frame times and prevent layout thrashing on every scroll tick.
🔬 Measurement: Verify via Chrome DevTools Performance tab. No layout recalculations should occur for the scroll progress bar during scrolling. The visual result remains unchanged.
PR created automatically by Jules for task 7105648551104091188 started by @dttdrv