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1. Commits on Oct 15, 2026

   • [JSC] BlockDirectory's bits should be guarded by a mutate-grow lock

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     kmiller68

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   • [JSC] Clarify what MarkedBlock's versioned mark and newly-allocated bits record

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     dhecht

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2. Commits on Oct 14, 2026

   • [JSC] Remove optimizeParallelSlotVisitorsForStoppedMutator and its protocol

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     dhecht

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   • [JSC] Rename the GC's bytes-visited counts to bytes marked and old generation cell bytes

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     dhecht

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   • [JSC] Keep SourceCodeCache if it was touched in the last full GC-cycle

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     Constellation

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3. Commits on Oct 13, 2026

   • [JSC] Make the GC's memory accounting work for collections of several heaps

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     dhecht

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   • Remove ShadowRealm

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     annevk

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   • Replace NODELETE with LEGACY_NODELETE in JavaScriptCore

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     rniwa

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4. Commits on Oct 12, 2026

   • [JSC] Make the GC's scope decision and visitor checks work for collections of several heaps

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     dhecht

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   • [JSC] Support heaps joining and leaving a Collector, for global collections

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     dhecht

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   • [JSC] Make heap analysis work for collections of several heaps

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     dhecht

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5. Commits on Oct 11, 2026

   • [JSC] Eden GC should sweep only new and dirty ArrayBuffers

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     sosukesuzuki

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6. Commits on Oct 9, 2026

   • [JSC] Make the GC's mutator scheduler work for collections of several heaps

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     dhecht

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7. Commits on Oct 8, 2026

   • [JSC] Make the GC verifier work on collections of several heaps

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     dhecht

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   • [JSC] Use the heap's own visitor in rememberExecutingAndCompilingCodeBlocks()

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     dhecht

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   • [JSC] Suspend compiler threads when any of a collection's heaps has JIT plans

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     dhecht

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   • [JSC] Sum the GC log and signpost values over all of the Collector's heaps

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     dhecht

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8. Commits on Oct 7, 2026

   • [JSC] Replace the Collector's Heap& with a vector of heaps

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     dhecht

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   • [JSC] Assert that Heap methods are only passed cells from that Heap

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     dhecht

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   • Fix the build after 322927@main

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     zakariaridouh

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   • [CMake] Fix the Mac Debug build after 322905@main

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     zakariaridouh

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9. Commits on Oct 6, 2026

   • [JSC] Read the Collector's heap through heap()

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     dhecht

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   • [JSC] Group the per-heap work of the Collector's Begin and End phases

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     dhecht

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10. Commits on Oct 1, 2026

    • [JSC] Clean up the boundary between the Collector and the Heap at the end of a collection

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      dhecht

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    • [JSC] Move the request queue checks and the mutator's phase loop from the Heap into the Collector

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      dhecht

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11. Commits on Sep 30, 2026

    • [JSC] Remove GCRequest's unused didFinishEndPhase callback

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      dhecht

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    • [JSC] Assert that no request outlives the collector thread instead of checking for it in relinquishConn()

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      dhecht

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    • [JSC] Clean up the boundary between the Collector and the Heap at the start of a collection

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      dhecht

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    • [JSC] Mark non-escaping lambda parameters as NOESCAPE

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      cdumez

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12. Commits on Sep 29, 2026

    • [libpas] Use tagged_bmalloc_heap for MTE allocations

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      Achierius

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    • [JSC] Separate the Heap's shutdown from its finalization

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      dhecht

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    • [JSC] Move the marking constraint set to the Collector

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      dhecht

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13. Commits on Sep 28, 2026

    • [JSC] Move the Collector's setup and teardown out of Heap's constructor and destructor

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      dhecht

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    • [JSC] Unify and extract JSONCache

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      Constellation

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14. Commits on Sep 27, 2026

    • [JSC] Name the Wasm callee cleanup Heap functions for the marking they do

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      dhecht

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