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https://github.com/Matysh/houseplan-card
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Claudeandclaude[bot]
6f17b6cd4c
A floor switch replaces the whole stage, so the card's pointer-hover MutationObserver receives hundreds of records whose targets are the same few containers. Each record re-ran `matches` and a `.devlayer` subtree `querySelector` on its target, and kept doing so after the device layer had already been found. The batch logic moves to `deviceLayerMutated` in device-hit-owner.ts: a node is checked at most once per batch, the first hit ends the checks, and every added node still goes through `_syncPointerHoverSubtree` in record order. The card shrinks by 12 lines. The View stair layer read the card's `_model` getter once more for every navigable stair; the getter rebuilds the config fingerprint on each read. `renderLayer` now reads it once. `languageRenderGate` wrote `lang` on the host on every render. It now writes it only when the value differs (language switch, English fallback, a foreign value); an unchanged value is left alone. No behaviour changes: DOM, tooltips and pixels are the same. Unit tests count subtree queries per node, `_model` reads per render and `lang` writes; one mutant per change restores the old behaviour. Issue: #694 User-Visible: no Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd