excalidraw-box
Code Issues

perf: eliminate layout thrashing and array allocations during drawing

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ruinivist
2026-06-02 07:59:39 +00:00
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## 2024-06-02 - Eliminate Layout Thrashing in Theme Sync
**Learning:** Interleaving `window.getComputedStyle().getPropertyValue()` and `element.style.setProperty()` inside a loop causes layout thrashing (forced synchronous layout) multiple times per animation frame during drawing.
**Action:** When synchronizing many DOM styles based on computed styles, always collect the computed values in a first pass, and only then apply `setProperty` updates in a separate second pass, preferably also skipping updates where the value hasn't actually changed.