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Commits on Jan 27, 2026

• [JSC][WASM][Debugger] Use RunLoop dispatch to handle Stop-The-World for idle VMs

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• Convert HashMap<..., RefPtr to Ref in NetworkProcess, take 2

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  annevk

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• [JSC] Construct ropes from String.prototype.replace with strings

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  Constellation

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Commits on Jan 26, 2026

• Eliminate unsafe buffer usage by adopting more C++20 std::ranges algorithms

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  iidmsa

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• Drop unnecessary usage of ternary operator in JavaScriptCore

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• [JSC] Add `reportBytecodeCacheDecodeTimes` option

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  sosukesuzuki

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• [JSC] remove feature flag for `Map.prototype.getOrInsert` et al

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  dcrousso

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Commits on Jan 25, 2026

• [JSC] Fix m_numberOfActiveVMs underflow in VMManager due to flag-counter desync

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  hyjorc1

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• Unreviewed, reverting 304975@main (7f525e50e298)

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  Constellation

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  JonWBedard

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Commits on Jan 24, 2026

• Unreviewed, reverting 305848@main (bbf8d344a5bb)

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Commits on Jan 23, 2026

• [JSC] Use Use Invocable in ArrayConstructor.cpp

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  syg

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• Address unsafe cast warnings under Source/WebCore/bindings

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  cdumez

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• [JSC] Account for user code to arguments in Array.from

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  syg

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Commits on Jan 22, 2026

• Rename CatchScope to TopExceptionScope

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  kmiller68

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• [JSC] Clarify the comment in JSCell::classInfo()

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  dhecht

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• Add diagnostics to help debug a crash in JSLock::unlock().

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  Menlodorian

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  Mark Lam

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• [JSC] Remove the B3 Air linear scan register allocator

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  dhecht

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Commits on Jan 21, 2026

• [JSC][GreedyRegAlloc] Add --airGreedyRegAllocSpillsEverything option

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  dhecht

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• [JSC] Release ThrowScope correctly in tryReplaceOneCharUsingString

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  syg

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• [JSC] Store 1 byte instead of 4 in didEnterVM for validateDFGClobberize

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Commits on Jan 20, 2026

• Unreviewed, reland "[bmalloc] Replace old bmalloc with mimalloc"

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  Constellation

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• Address some unsafe cast warning in Internals.cpp

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  cdumez

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• [JSC] Use `hasSpecialProperties` bit for cheking `constructor` properties

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  sosukesuzuki

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• [JSC] Optimize `[...set]`

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  sosukesuzuki

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• [JSC] Handle `StringCodePointAt` in Abastract Interpreter

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Commits on Jan 19, 2026

• Allow implicit conversion from RefPtr<T> to T*

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  cdumez

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• Use HashMap's get() instead of find() in WaiterListManager & RemoteLayerTreeEventDispatcher

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  annevk

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Commits on Jan 17, 2026

• [JSC][WASM][Debugger] Avoid RefPtr operations during thread suspension to fix deadlock

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  hyjorc1

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• Unreviewed, reverting 305759@main (6f5be90dea47)

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  JonWBedard

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• [bmalloc] Replace old bmalloc with mimalloc

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  Constellation

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• Temporarily revert assertion in VMTraps::deferTerminationSlow() to a Debug ASSERT.

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  Mark Lam

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Commits on Jan 16, 2026

• [JSC] Add fast path for Array.prototype.slice on ScopedArguments

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  sosukesuzuki

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• [JSC] Fix `%TypedArray%.prototype.subarray` to Calculate `beginByteOffset` correctly to Align with ECMA-262

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  Gumichocopengin8

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  graouts

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Commits on Jan 15, 2026

• ThrowScopes should not be able to clear termination exceptions

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  kmiller68

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• Fix a race condition with the setting of VM::m_hasTerminationRequest.

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  Mark Lam

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