Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 0a95f7ae67392ec73a6cb351f1054b3b9395bf0a
https://github.com/WebKit/WebKit/commit/0a95f7ae67392ec73a6cb351f1054b3b9395bf0a
Author: Yusuke Suzuki <[email protected]>
Date: 2023-05-08 (Mon, 08 May 2023)
Changed paths:
M Source/JavaScriptCore/runtime/JSObject.h
M Source/JavaScriptCore/runtime/JSObjectInlines.h
M Source/JavaScriptCore/runtime/ObjectConstructor.h
Log Message:
-----------
[JSC] Simplify constructEmptyObject
https://bugs.webkit.org/show_bug.cgi?id=256478
rdar://109049306
Reviewed by Alexey Shvayka and Keith Miller.
This patch simplifies constructEmptyObject because this is super hot code in
JSON.parse.
1. gcSafeZeroMemory is not necessary in JSFinalObject's constructor. memset is
OK since
this object is not exposed to GC yet.
2. We use constant defaultInlineCapacity in constructEmptyObject's fast path to
make
the above constant assignment instead of loop.
* Source/JavaScriptCore/runtime/JSObject.h:
(JSC::JSFinalObject::createWithButterfly):
* Source/JavaScriptCore/runtime/JSObjectInlines.h:
(JSC::JSFinalObject::createDefaultEmptyObject):
* Source/JavaScriptCore/runtime/ObjectConstructor.h:
(JSC::constructEmptyObject):
Canonical link: https://commits.webkit.org/263815@main
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