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⚡ Bolt: [React Flow WeakMap Cache for Derived State] #693

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⚡ Bolt: [React Flow WeakMap Cache for Derived State] #693

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3 changes: 3 additions & 0 deletions .jules/bolt.md
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Expand Up @@ -77,3 +77,6 @@ Optimized metric route processing to O(N) by creating a mapping of routes direct
## 2024-07-13 - [Optimize Export Dictionary FK lookups]
**Learning:** Found O(N * C * E) performance bottleneck in ERD export dictionaries due to repeated array searching with `edges.some()` inside a nested loop over nodes and columns.
**Action:** Replace repeated linear array scans for edges by precomputing O(1) Set lookups of foreign key column handles per node before looping.
## 2026-07-20 - React Flow Cache for Derived State
**Learning:** For React Flow performance during drag events (60fps updates), avoiding creating new `data` objects in derived state (like `visibleNodes`) is crucial as it breaks `React.memo` and forces full re-renders of massive UI elements like tables.
**Action:** When filtering or enriching nodes (e.g., adding `isDimmed` / `isHighlighted`), use a `WeakMap` keyed by the stable `node.data` reference to cache decorated state, preserving object identity across animation frames.
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