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⚡ Bolt: Optimize ChatMessageItem re-renders with React.memo #29

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⚡ Bolt: Optimize ChatMessageItem re-renders with React.memo #29

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17 changes: 15 additions & 2 deletions packages/web-ui/src/components/ai/chat/ChatMessageItem.tsx
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import { Box, Avatar, Typography, Paper, Accordion, AccordionSummary, AccordionDetails, Chip, ListItem, CircularProgress, Tooltip, IconButton, Stack, alpha } from '@mui/material';
import { User as UserIcon, Command, Bot, ChevronDown, Wrench, Brain, RotateCcw, GitFork } from 'lucide-react';
import { ChatMessage } from './types.js';
import { useState, useEffect } from 'react';
import { useState, useEffect, memo } from 'react';
import { ChatMessageRenderer } from './ChatMessageRenderer.js';

interface ChatMessageItemProps {
Expand All @@ -12,7 +12,7 @@ interface ChatMessageItemProps {
isGrouped: boolean;
}

export function ChatMessageItem({ msg, onRerun, onFork, disabledActions = false, isGrouped = false }: ChatMessageItemProps) {
function ChatMessageItemComponent({ msg, onRerun, onFork, disabledActions = false, isGrouped = false }: ChatMessageItemProps) {
const [isThinkingExpanded, setIsThinkingExpanded] = useState(true);
const [isHovered, setIsHovered] = useState(false);

Expand Down Expand Up @@ -249,3 +249,16 @@ export function ChatMessageItem({ msg, onRerun, onFork, disabledActions = false,
</ListItem>
);
}

export const ChatMessageItem = memo(ChatMessageItemComponent, (prevProps, nextProps) => {
return (
prevProps.msg.id === nextProps.msg.id &&
prevProps.msg.content === nextProps.msg.content &&
prevProps.msg.toolCalls === nextProps.msg.toolCalls &&
prevProps.msg.toolResults === nextProps.msg.toolResults &&
prevProps.disabledActions === nextProps.disabledActions &&
prevProps.isGrouped === nextProps.isGrouped &&
prevProps.onRerun === nextProps.onRerun &&
prevProps.onFork === nextProps.onFork
);
});