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Skip empty replaceChildren visual work - #560
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This was referenced Sep 19, 2026
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Closes #559. Advances #243 and #235.
Zero-argument
replaceChildren()now returns after WebIDL/receiver processing when the target already has no native children or text. This avoids redundant detach/recascade/layout/scene work in unchanged Code OSS panel/row clears while preserving every real removal, reinsert, focus, mutation, custom-element lifecycle, selector and publication path.Validation intentionally deferred:
git diff --checkpassed; 8,192 redundant clears and 512-row real churn/lifecycle/identity/low-memory regressions were authored but not executed. Pinned Code OSS A/B, browser/package, pixel, physical performance and memory gates remain in #243.