solidjs / solid / 34577014727

72%

main: 89%

push

github

perf(store): stamp owned backings with $OWNER instead of weak-collection registrations (#3360) (#3368)

Every backing the store allocates (CoW clones, privatized committed
backings) now carries its owning target under an enumerable symbol. This
replaces the per-draft ownedRaw.add + raw->target map.set that dominated
the one-key write floor (V8 identity hash + ephemeron registration on a
fresh object). storeNextLookup / family maps now hold only unowned raws;
lookupTarget resolves stamp-first within a family.

The stamp is hidden by the get/has/getOwnPropertyDescriptor/ownKeys traps,
skipped by snapshot, membership and deep-witness diffs, reconcile,
optimistic staging and affects walks, and never acquires a node.

Steady-state single-key writes: 340 -> ~178 ns (rc.7 674, rc.0 214).

Fixes #3360

Co-authored-by: Claude via Cursor <noreply@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

519 of 790 branches covered (65.7%)

Branch coverage included in aggregate %.

772 of 1007 relevant lines covered (76.66%)

15.02 hits per line