⚡ Bolt: [performance improvement] Optimize WebSocket list rendering#133
⚡ Bolt: [performance improvement] Optimize WebSocket list rendering#133primoscope wants to merge 1 commit intomainfrom
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Extracted static utility functions out of component bodies in LogPanel and ProgressPanel to avoid reallocation on every render. Wrapped LogItem and DownloadItem list elements in React.memo() to prevent O(N) re-renders during high-frequency WebSocket tick updates. Added client-generated stable IDs to log messages to use as React keys rather than array indices. Co-authored-by: dzp5103 <214723817+dzp5103@users.noreply.github.com>
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💡 What: Optimized list rendering in
ProgressPanel.tsxandLogPanel.tsxby usingReact.memoand extracting static functions.🎯 Why: When high-frequency WebSocket updates arrived (e.g.
download_speedorprogressticks, or rapidly streaming logs), the entire list of items re-rendered. For logs, relying on array indices as keys caused full unmount/remount cycles.📊 Impact: Reduces O(N) full-list re-renders to O(1) single-item updates. Only the specific
DownloadItemwhose primitive data has changed will re-render.🔬 Measurement: Verified visually with Playwright. Can also be measured via React DevTools Profiler by observing render times during active downloading.
PR created automatically by Jules for task 16733582474175324606 started by @dzp5103