Plate 17
Immer vs Mutative: 86 us vs 3 us per Update
Hands-on5 Oct 2026 · 4 min
Topic
immer
2 posts
Topic
2 posts
Plate 17
Plate 60
zustand 5.0.15 vs @reduxjs/toolkit 2.13.0 + react-redux 9.3.0 on React 19.3.0 (jsdom, NODE_ENV=production). 1,000 selector-subscribed rows, 300 flushSync updates x 7 trials, 2 runs: per-update median 0.137/0.139 ms vs 0.676/0.694 ms (~5x); 1 row re-rendered per update in both. Store-only: 1,376,191 vs 6,502 updates/s; Immer autoFreeze off lifts RTK to 386,966. Gzip (React external): 387 B vs 9,708 B. Fixture /workspace/bench-zustand-rtk/.