⚡ bolt: [performance improvement]#29
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Replaced the width animation on .scroll-progress with a GPU-accelerated transform: scaleX(0...1) to avoid layout thrashing during scroll events.
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💡 What: Replaced the CSS
widthtransition and JSstyle.widthupdates on the.scroll-progresselement with atransform: scaleX()approach.🎯 Why: Animating the
widthproperty during a high-frequency event like scrolling forces the browser to recalculate the layout and repaint on every frame, which causes jank. By usingtransform: scaleX(), the animation is offloaded to the GPU compositor layer, skipping layout entirely.📊 Impact: Reduces layout recalculations (thrashing) to zero for the progress bar during scrolling, resulting in smoother 60fps performance, especially on low-end devices.
🔬 Measurement: Verify by scrolling the page while recording a Performance profile in Chrome DevTools. Observe that "Recalculate Style" and "Layout" events caused by the progress bar update are no longer present.
PR created automatically by Jules for task 15132170364255815083 started by @dttdrv