Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 12bbbd4b4f3c62309dd8bbd5acd81e8e46b96aab
https://github.com/WebKit/WebKit/commit/12bbbd4b4f3c62309dd8bbd5acd81e8e46b96aab
Author: Sosuke Suzuki <[email protected]>
Date: 2025-11-11 (Tue, 11 Nov 2025)
Changed paths:
A JSTests/microbenchmarks/array-from-direct-arguments.js
A JSTests/microbenchmarks/array-from-scoped-arguments.js
A JSTests/stress/array-from-direct-arguments.js
A JSTests/stress/array-from-scoped-arguments.js
M Source/JavaScriptCore/builtins/ArrayConstructor.js
M Source/JavaScriptCore/builtins/BuiltinNames.h
M Source/JavaScriptCore/bytecode/LinkTimeConstant.h
M Source/JavaScriptCore/runtime/ArrayConstructor.cpp
M Source/JavaScriptCore/runtime/ArrayConstructor.h
M Source/JavaScriptCore/runtime/ArrayPrototype.cpp
M Source/JavaScriptCore/runtime/ArrayPrototype.h
M Source/JavaScriptCore/runtime/JSGlobalObject.cpp
Log Message:
-----------
[JSC] Add fast path for `Array.from(arguments)`
https://bugs.webkit.org/show_bug.cgi?id=302236
Reviewed by Yusuke Suzuki.
This patch changes to add fast path for `Array.from(arguments)`.
note: This patch only supports `DirectArguments` and `ScopedArguments`.
I'll add support for `ClonedArguments` in next patch.
TipOfTree Patched
array-from-scoped-arguments 9.1958+-0.1530 ^ 3.6832+-0.2937
^ definitely 2.4967x faster
array-from-direct-arguments 8.2003+-0.1391 ^ 2.8755+-0.0549
^ definitely 2.8518x faster
Test: JSTests/microbenchmarks/array-from-direct-arguments.js
* JSTests/microbenchmarks/array-from-direct-arguments.js: Added.
(test):
* JSTests/microbenchmarks/array-from-scoped-arguments.js: Added.
(test):
* JSTests/stress/array-from-direct-arguments.js: Added.
(shouldBe):
(test):
(noInline):
* JSTests/stress/array-from-scoped-arguments.js: Added.
(shouldBe):
(test):
(noInline):
* Source/JavaScriptCore/builtins/ArrayConstructor.js:
* Source/JavaScriptCore/builtins/BuiltinNames.h:
* Source/JavaScriptCore/bytecode/LinkTimeConstant.h:
* Source/JavaScriptCore/runtime/ArrayConstructor.cpp:
(JSC::tryCreateArrayFromArguments):
(JSC::tryCreateArrayFromScopedArguments):
(JSC::tryCreateArrayFromDirectArguments):
(JSC::JSC_DEFINE_HOST_FUNCTION):
* Source/JavaScriptCore/runtime/ArrayConstructor.h:
* Source/JavaScriptCore/runtime/ArrayPrototype.cpp:
* Source/JavaScriptCore/runtime/ArrayPrototype.h:
* Source/JavaScriptCore/runtime/JSGlobalObject.cpp:
(JSC::JSGlobalObject::init):
Canonical link: https://commits.webkit.org/302891@main
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