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https://github.com/danny-avila/LibreChat.git
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7181174c3b
* perf: add custom memo comparator to MessageIcon for stable re-render gating MessageIcon receives full `agent` and `assistant` objects as props from useMessageActions, which recomputes them when AgentsMapContext or AssistantsMapContext update (e.g., react-query refetch on window focus). These context-triggered re-renders bypass MessageRender's React.memo, producing new object references for agent/assistant even when the underlying data is unchanged. The default shallow comparison in MessageIcon's memo then fails, causing unnecessary re-renders that manifest as visible icon flickering. Add arePropsEqual comparator that checks only the fields MessageIcon actually uses (name, avatar filepath, metadata avatar) instead of object identity, so the component correctly bails out when icon-relevant data hasn't changed. * refactor: export arePropsEqual, drop redundant useMemos, add JSDoc - Export arePropsEqual so it can be tested in isolation - Add JSDoc documenting which fields are intentionally omitted (id) and why iconData uses reference equality - Replace five trivial useMemo calls (agent?.name ?? '', etc.) with direct computed values — the custom comparator already gates re-renders, so these memos only add closure/dep-array overhead without ever providing cache hits - Remove unused React import * test: add unit tests for MessageIcon arePropsEqual comparator Exercise the custom memo comparator to ensure: - New object references with same display fields are treated as equal - Changed name or avatar filepath triggers re-render - iconData reference change triggers re-render - undefined→defined agent with undefined fields is treated as equal * fix: replace nested ternary with if-else for eslint compliance * test: add comment on subtle equality invariant and defined→undefined case * perf: compare iconData by field values instead of reference iconData is a useMemo'd object from the parent, but comparing by reference still causes unnecessary re-renders when the parent recomputes the memo with identical primitive values. Compare all five fields individually (endpoint, model, iconURL, modelLabel, isCreatedByUser) for consistency with how agent/assistant are handled. |
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