⚡ Bolt: optimize chat message re-renders#99
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- Memoize MessageBubble and ThinkingIndicator components - Optimize props to localize re-renders to affected items only - Reduce ReactMarkdown re-rendering overhead during streaming and copy actions
…lity - Memoize MessageBubble and ThinkingIndicator components - Optimize props to localize re-renders to affected items - Extract message actions into sub-components (EditAction, CopyAction) - Integrate HeroUI components for message actions - Use descriptive prop names (isGenerating) and remove unnecessary comments
- Refactor MessageBubble to use data-role attributes - Use Tailwind data- modifiers for conditional alignment and styling - Improve code cleanliness by removing ternary operators in className strings - Maintain performance optimizations (memoization and localized props)
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💡 What: Optimized the Chat component by memoizing message bubbles and the thinking indicator. Refactored props to use booleans (
isCopied,isTyping) instead of passing parent state identifiers.🎯 Why: Previously, every message in the chat would re-render whenever a new message was being streamed or when any message was copied. This was due to the entire message list receiving updated parent state props. Since
MessageBubbleusesReactMarkdown, these redundant re-renders were computationally expensive.📊 Impact: Reduces re-renders from$O(N)$ to $O(1)$ during streaming and clipboard actions, significantly improving UI responsiveness and reducing CPU usage in long conversations.
🔬 Measurement: Can be verified using React DevTools Profiler by observing that only the active/copied message bubbles highlight during updates.
PR created automatically by Jules for task 10170850428801528950 started by @amrabed