solidjs / solid / 40662324762

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fix(store): clone plain arrays by slice() on the first draft write (#4339)

cloneRaw graded every array as non-plain (Array.prototype, non-enumerable
length), so the first draft write to a store array copied one property
descriptor per element. A push into a 10k-row store cost ~10.7 ms per write;
with slice() it is ~0.15 ms. Arrays with accessors, named keys or a
non-Array prototype keep the descriptor path.


Claude-Session: https://claude.ai/code/session_0117BoWPYGDS9E7Cd5jHUxWx

Co-authored-by: Claude <noreply@anthropic.com>

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