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1. Commits on Oct 24, 2026

   • [JSC] Fuse null tests into backward conditional jumps

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2. Commits on Oct 23, 2026

   • [JSC] Avoid using wrapper iterator in builtins

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   • [JSC] Remove BIGINT32

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   • [JSC] Avoid creating fresh Source for each JSBoundFunction

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3. Commits on Oct 22, 2026

   • [WTF] Teach zmij ECMAScript Number::toString formatting instead of wrapping it

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

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   • [JSC] Fixup Int32Use/Int52RepUse/DoubleRepUse for ToPropertyKey

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   • [JSC] Add additional array creation fast path after getting "constructor"

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   • [JSC] Map/Set/WeakMap/WeakSet should accept undefined/null as iterable (but not producing anything) in DFG

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   • [JSC] Do not copy |this| into a temporary when it is the base of an assignment

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4. Commits on Oct 21, 2026

   • [JSC] DFG should not fold ResolvePromiseFirstResolving into a fulfill when the value can be the promise

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   • Unreviewed, relanding 324148@main with nit

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   • [WTF] Replace dragonbox with zmij

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   • [JSC] BigInt64 / BigUint64 toNativeFromValueWithoutCoercion should check content

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   • [JSC] Proxy should directly call a function when it does not have apply handler

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5. Commits on Oct 20, 2026

   • [JSC] Quickly scan whether we have OAS target nodes

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   • [JSC] PutStackSinking should run only when ArgumentsElimination did some job

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   • [JSC] FTL StringLocaleCompare should skip the equal ASCII prefix a word at a time

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   • [JSC] B3 LowerToAir's xor-and-rotate match should require a logical right shift and mask shift amounts

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   • [JSC] B3 ReduceStrength should check the zip lane before turning a vector shift of a zip into an extend

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   • [JSC] B3 ReduceStrength should not fold Trunc(SShr(Shl(SExt32(x), c), c)) to x for a negative c

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   • [JSC] Compute double modulo by a power-of-two constant inline in DFG / Baseline

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   • [JSC] any.convert_extern should accept a subtype of externref

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   • [JSC] DFG Array.push with 0-argument should throw an error when length is not writable

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6. Commits on Oct 19, 2026

   • [JSC] Allocate poly proto objects in create_this fast paths

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   • [JSC] Truncate int32 multiplications by narrow integer typed array loads

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   • [JSC] FTL short constant string comparison should handle 16-bit strings inline

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   • [JSC] Skip identical printable ASCII prefix in Intl.Collator ASCII fast path

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7. Commits on Oct 16, 2026

   • [JSC] Use BulkMemoryValue MemoryMove for FTL TypedArraySet

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   • [JSC] Extract CheckArray from TypedArraySet

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   • [JSC] FTL direct calls should not link to the arity-checking entrypoint when they pass enough arguments

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   • [JSC] Inline string === "constant"

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   • [JSC] Add isGCSafe flag to BulkMemoryValue and rename MemoryCopy to MemoryMove

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8. Commits on Oct 15, 2026

   • [JSC] LLInt should not poll the JIT worklist on every execution while a baseline compile is in flight

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   • [JSC] B3 foldPathConstants should treat a boolean branch condition as 1 on the taken edge

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