Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 804d44f89619bfae3e5e2e21a07669b1fb320d57
https://github.com/WebKit/WebKit/commit/804d44f89619bfae3e5e2e21a07669b1fb320d57
Author: Yusuke Suzuki <ysuz...@apple.com>
Date: 2024-04-04 (Thu, 04 Apr 2024)
Changed paths:
A JSTests/microbenchmarks/clone-objects-via-spread.js
M Source/JavaScriptCore/builtins/BuiltinNames.h
M Source/JavaScriptCore/bytecode/LinkTimeConstant.h
M Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp
M Source/JavaScriptCore/parser/Nodes.h
M Source/JavaScriptCore/runtime/JSGlobalObject.cpp
M Source/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp
M Source/JavaScriptCore/runtime/JSGlobalObjectFunctions.h
M Source/JavaScriptCore/runtime/ObjectConstructorInlines.h
Log Message:
-----------
[JSC] Cloning via Object Literal + 1 Spread should be super fast
https://bugs.webkit.org/show_bug.cgi?id=272131
rdar://125883824
Reviewed by Alexey Shvayka.
For the pattern like,
`{ ...object }`
we can use super fast object cloning since there are no properties. After
checking object is very specifc conditioned FinalObject,
we can just grab a structure, copy butterfly, and create a new object with them.
ToT Patched
clone-objects-via-spread 96.1927+-0.3467 ^ 15.9928+-0.1021
^ definitely 6.0147x faster
* JSTests/microbenchmarks/clone-objects-via-spread.js: Added.
(test):
* JSTests/stress/clone-objects-via-spread.js: Added.
(test):
* Source/JavaScriptCore/builtins/BuiltinNames.h:
* Source/JavaScriptCore/bytecode/LinkTimeConstant.h:
* Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp:
(JSC::ObjectLiteralNode::emitBytecode):
* Source/JavaScriptCore/parser/Nodes.h:
* Source/JavaScriptCore/runtime/JSGlobalObject.cpp:
(JSC::JSGlobalObject::init):
* Source/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp:
(JSC::JSC_DEFINE_HOST_FUNCTION):
* Source/JavaScriptCore/runtime/JSGlobalObjectFunctions.h:
* Source/JavaScriptCore/runtime/ObjectConstructorInlines.h:
(JSC::checkStrucureForClone):
(JSC::objectCloneFast):
(JSC::tryCreateObjectViaCloning):
Canonical link: https://commits.webkit.org/277097@main
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