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Commits on Jun 8, 2026

• Heap needs to protect swaped JSString Impls for GCOwnedDataScope

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Commits on Jun 6, 2026

• [JSC] NativeExecutable should have name and length in the same way to FunctionExecutable

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Commits on Jun 2, 2026

• [JSC] MapIterator / SetIterator should be handled in DFG

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• Fix baseline write barrier handling in OpDelBy{Id,Val}

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• [JSC] Add foundation of handling builtin iterators in fast-iteration-protocol

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Commits on Jun 1, 2026

• [JSC] Add String fast iteration

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Commits on May 22, 2026

• [JSC] Improve rope-string comparison

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• Unreviewed, reverting 313672@main (371f7ad0ed89)

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  nipunshukla21

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• [JSC] Add DFG node for `String.fromCodePoint`

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Commits on May 21, 2026

• Give JIT helper threads QOS_UTILITY on less powerful devices

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  nipunshukla21

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Commits on May 20, 2026

• [JSC] Collect profile from Baseline JIT compiler when LLInt -> Baseline

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• [JSC] Add new `DateNow` DFG node

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Commits on May 18, 2026

• [JSC] Shrink sizeof(JSGenerator)

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Commits on May 15, 2026

• [JSC] Extend megamorphic ByVal IC with symbols

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• Remove JSHeapInt32/Double

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  kmiller68

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• [JSC] Optimize stricteq with non-String / non-HeapBigInt cells

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Commits on May 14, 2026

• Use modern integer hash

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Commits on May 13, 2026

• [JSC] Drop ThreadSpecificAssemblerData heap buffer under memory pressure

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• [JSC] Add RISCV64 support to GdbJIT ELF records

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Commits on May 7, 2026

• Optimize JavaScriptCore #includes

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Commits on May 6, 2026

• [libpas] Enable JIT-heap on Windows

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Commits on May 5, 2026

• REGRESSION: WebAssembly SIMD produces incorrect result on x86_64 Linux (argon2id hash mismatch)

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• [JSC] normalizeWidths() should return a RegisterSet

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  kmiller68

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Commits on May 3, 2026

• Re-land "[Build speed] Reduce JSC includes in WebCore JS bindings"

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  geoffreygaren

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Commits on Apr 27, 2026

• [JSC] Add Map / Set fast iteration

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• [Build Speed] Fix compilation issues in JSC headers

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  jernoble

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Commits on Apr 21, 2026

• [JSC] Fix megamorphic IC ownProperty check

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  syg

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• [Build Speed] Minimize includes in CodeBlock.h, JSCJSValue.h, JSCJSValueInlines.h, and VM.h

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  jernoble

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• [JSC] Implement relaxed Wasm SIMD

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Commits on Apr 20, 2026

• [JSC] Fix !ENABLE(JIT) build

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  mcatanzaro

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• Further reduce use of jsCast<>()

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  cdumez

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• Unreviewed, use UncheckedKeyHashMap / UncheckedKeyHashSet

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Commits on Apr 19, 2026

• Drop jsDynamicCast<>() in favor of dynamicDowncast<>()

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  cdumez

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  darinadler

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Commits on Apr 18, 2026

• Unreviewed, reverting 311492@main (e7ae451260d7)

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  JonWBedard

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Commits on Apr 17, 2026

• [JSC] Fix !ENABLE(JIT) build

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  syg

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  mcatanzaro

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