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1. Commits on Oct 27, 2026

   • Fix Apple Simulator and MacCatalyst builds to not build libJavaScriptCoreTools, mya, and testLibJSCTools.

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     Mark Lam

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   • [JSC] `Proxy.revocable` should not set up the revoke function on each call

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     sosukesuzuki

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2. Commits on Oct 26, 2026

   • [JSC] Merge BytecodeGeneratorBase into BytecodeGenerator

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     Constellation

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3. Commits on Oct 24, 2026

   • Remove "Unlock keychain" script phases from the Xcode build

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     emw-apple

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4. Commits on Oct 22, 2026

   • [JSC] HasOwnPropertyCache should record structure + "1"

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     Constellation

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5. Commits on Oct 20, 2026

   • [JSC] Avoid accessing missing indexing headers in Butterfly helpers.

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     clopez

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6. Commits on Oct 13, 2026

   • Remove ShadowRealm

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     annevk

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7. Commits on Oct 9, 2026

   • Add a prevalent domain taint kind to JSC source taintedness

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     charliewolfe

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8. Commits on Oct 8, 2026

   • Address Safer C++ static analysis warnings in WebCore bindings code

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     cdumez

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9. Commits on Oct 7, 2026

   • [JSC] Evaluate constant array literal elements once in ArrayNode::emitBytecode

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     Constellation

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10. Commits on Oct 3, 2026

    • [JSC] Add fast embedded transition cache for JSON.parse

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11. Commits on Sep 28, 2026

    • [JSC] Unify and extract JSONCache

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12. Commits on Sep 27, 2026

    • Introducing Corpse::Memory for managing read access to remote corpse memory.

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      Mark Lam

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13. Commits on Sep 25, 2026

    • [JSC] Add JSONTransitionCache

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      Constellation

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    • [JSC] Move the Collector implementation out of Heap.cpp

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      dhecht

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    • [Safer CPP] Use RefPtr / adoptRef instead of JSRetainPtr / adopt() throughout the codebase

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      cdumez

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14. Commits on Sep 24, 2026

    • [JSC] Split the GC's collection-cycle state and machinery into a Collector class

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      dhecht

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15. Commits on Sep 21, 2026

    • [JSC] Extract specialize-select from B3::ReduceStrength

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      Constellation

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    • [JSC] Do not track lines and columns while parsing

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      ast-hugger

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    • [JSC] Use PlainGregorianDateTime and drop GregorianDateTime

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      Constellation

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16. Commits on Sep 19, 2026

    • Reduce use of untyped CString and add encoding-aware JSStringRef conversions

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      cdumez

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17. Commits on Sep 2, 2026

    • [JSC] Make DateInstance non-destructible

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18. Commits on Sep 1, 2026

    • [JSC] Remove SnippetReg

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      Constellation

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19. Commits on Aug 31, 2026

    • [JSC] Remove JSValueRegs

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      Constellation

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20. Commits on Aug 28, 2026

    • [Re-landing] Introducing Mya, a MemorY Analyzer, and libJavaScriptCoreTools.

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      Mark Lam

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21. Commits on Aug 27, 2026

    • Reverting 319904@main: Broke Simulator and Catalyst builds.

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      Mark Lam

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22. Commits on Aug 26, 2026

    • Introducing Mya, a MemorY Analyzer, and libJavaScriptCoreTools.

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      Mark Lam

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23. Commits on Aug 17, 2026

    • [JSC] Apply Promise.try spec change

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24. Commits on Aug 13, 2026

    • [JSC] Rename HeapFinalizerCallback to GCCompletionCallback

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      dhecht

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    • [JSC] Introduce AirInstAnalyzer

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      Constellation

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25. Commits on Aug 12, 2026

    • [JSC] Quick pattern matching for byte-copy loop in OMG

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      Constellation

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26. Commits on Aug 3, 2026

    • [JSC] Introduce StrongBlock

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      Constellation

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27. Commits on Aug 2, 2026

    • [JSC] Remove StringRecursionChecker

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      Constellation

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    • Remove 32-bit JSValues.

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      justinmichaud

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28. Commits on Aug 1, 2026

    • [armv7] Remove ARMv7 JIT support

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      justinmichaud

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