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⚡ Optimize state initialization in hooks using lazy evaluation#28

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johnstrand merged 1 commit into
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perf/lazy-init-state-8646321819898523556
Jul 8, 2026
Merged

⚡ Optimize state initialization in hooks using lazy evaluation#28
johnstrand merged 1 commit into
masterfrom
perf/lazy-init-state-8646321819898523556

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💡 What: Modified useSquawk and usePending to use lazy initialization for useState by passing an initializer function () => globalState.get() and () => pendingState.get() instead of directly calling .get().

🎯 Why: Previously, useState evaluated its argument on every single re-render of components using these hooks. For large global states with deep structures, calling globalState.get() causes a full shallow copy (Object spread { ...globalState }) which is a significant waste of CPU time and triggers unnecessary garbage collections, considering useState ignores the argument on subsequent renders. Lazy initialization prevents this.

📊 Measured Improvement:
A benchmark simulating a component performing 10,000 forced re-renders connected to a store with 10,000 keys was created and run on the baseline and the optimized code using react-test-renderer:

  • Baseline: 71,859 ms (~71 seconds)
  • Optimized: ~305 ms
  • Change: ~235x faster (a 99.5% reduction in re-render time for hooks subscribing to large stores).

PR created automatically by Jules for task 8646321819898523556 started by @johnstrand

Co-authored-by: johnstrand <11484777+johnstrand@users.noreply.github.com>
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@johnstrand johnstrand merged commit e525c29 into master Jul 8, 2026
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@johnstrand johnstrand deleted the perf/lazy-init-state-8646321819898523556 branch July 8, 2026 14:29
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