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Commits on May 15, 2026

• Remove JSHeapInt32/Double

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

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Commits on Apr 21, 2026

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

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Commits on Apr 20, 2026

• Further reduce use of jsCast<>()

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Commits on Mar 27, 2026

• [JSC] Introduce Realm-less Objects

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Commits on Feb 11, 2026

• [LOL] Add switch/throw bytecodes

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Commits on Feb 5, 2026

• [JSC] Remove unused op_overrides_has_instance

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• [JSC] Remove op_rest_length

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Commits on Jan 31, 2026

• Remove op_end

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Commits on Dec 4, 2025

• Adopt C++20 Concepts in JavaScriptCore/jit

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Commits on Jul 11, 2025

• Unreviewed, relanding 297160@main

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Commits on Jul 10, 2025

• Unreviewed, reverting 297160@main.

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Commits on Jul 9, 2025

• [JSC] Add list style switch

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Commits on May 22, 2025

• [JSC] eval calls should not create JSCallee for each invocation

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Commits on May 5, 2025

• [JSC] Use [[noreturn]] in C++

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  Gumichocopengin8

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  kmiller68

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Commits on May 3, 2025

• Start adopting C++20's [[likely]] / [[unlikely]] in JSC

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Commits on Apr 12, 2025

• Web Inspector: Debugger: add a way to step over `await` as though it was sync code

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Commits on Apr 4, 2025

• Unreviewed, reverting 292040@main.

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Commits on Mar 17, 2025

• [JSC] Add NewRegExpUntyped DFG node

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Commits on Mar 12, 2025

• Unreviewed, reverting 292008@main.

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  webkit-commit-queue

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• [JSC] Use 3-operand instructions more in Baseline / DFG

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Commits on Nov 19, 2024

• Replace WTF::bitwise_cast with std::bit_cast

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Commits on Oct 10, 2024

• Unreviewed, reverting 284931@main and 284940@main.

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  webkit-commit-queue

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Commits on Oct 9, 2024

• [JSC] Don't use JSScope instances as `this` value when calling functions

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  Alexey Shvayka

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Commits on Oct 4, 2024

• [JSC] Add defaultOffset from bytecode to SwitchTables

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Commits on Sep 24, 2024

• [JSC] Fuse `instanceof` bytecodes to one to reduce the emitted bytecode size

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Commits on Sep 23, 2024

• [JSC] Move BaselineJITExecutionCounter to BaselineJITData

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Commits on Aug 13, 2024

• [JSC] Make DataIC inline code adaptive

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Commits on Jul 15, 2024

• [JSC] Simplify JSFunction creation operation

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Commits on Jul 11, 2024

• [JSC] Materialize JITData register in DFG

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Commits on Jul 1, 2024

• [JSC] Inline hot part of op_enter in Baseline JIT

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Commits on Jun 26, 2024

• [JSC] Add inlined fast path for jfalse

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Commits on Jun 20, 2024

• Use SystemV ABI for Baseline JS JIT on Windows

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  iangrunert

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Commits on May 26, 2024

• Drop FixedVector::data() in favor of span() / mutableSpan()

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Commits on Apr 23, 2024

• [JSC] Micro-optimize stricteq in Baseline JIT with bitwise-comparable constants

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