Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: d53865edf63b4dc3620a616e60cbd9d48c6345bc
https://github.com/WebKit/WebKit/commit/d53865edf63b4dc3620a616e60cbd9d48c6345bc
Author: Sosuke Suzuki <[email protected]>
Date: 2026-05-20 (Wed, 20 May 2026)
Changed paths:
A JSTests/microbenchmarks/date-now-elapsed.js
A JSTests/microbenchmarks/date-now.js
A JSTests/stress/date-now-jit.js
M Source/JavaScriptCore/dfg/DFGAbstractHeap.h
M Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
M Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp
M Source/JavaScriptCore/dfg/DFGClobberize.h
M Source/JavaScriptCore/dfg/DFGCloneHelper.h
M Source/JavaScriptCore/dfg/DFGDoesGC.cpp
M Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
M Source/JavaScriptCore/dfg/DFGLoopUnrollingPhase.cpp
M Source/JavaScriptCore/dfg/DFGNodeType.h
M Source/JavaScriptCore/dfg/DFGOperations.cpp
M Source/JavaScriptCore/dfg/DFGOperations.h
M Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp
M Source/JavaScriptCore/dfg/DFGSafeToExecute.h
M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h
M Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
M Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
M Source/JavaScriptCore/ftl/FTLCapabilities.cpp
M Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
M Source/JavaScriptCore/jit/CCallHelpers.h
M Source/JavaScriptCore/runtime/DateConstructor.cpp
M Source/JavaScriptCore/runtime/Intrinsic.h
Log Message:
-----------
[JSC] Add new `DateNow` DFG node
https://bugs.webkit.org/show_bug.cgi?id=315065
Reviewed by Yusuke Suzuki.
Add a DateNow DFG node so that Date.now() is inlined in DFG and FTL
instead of going through a host function call. The implementation is
a simple direct call to operationDateNow.
TipOfTree Patched
date-now 25.5180+-0.3178 ^ 21.5319+-0.2979 ^
definitely 1.1851x faster
date-now-elapsed 24.4737+-0.2168 ^ 20.4836+-0.1619 ^
definitely 1.1948x faster
Tests: JSTests/microbenchmarks/date-now-elapsed.js
JSTests/microbenchmarks/date-now.js
JSTests/stress/date-now-jit.js
* JSTests/microbenchmarks/date-now-elapsed.js: Added.
* JSTests/microbenchmarks/date-now.js: Added.
* JSTests/stress/date-now-jit.js: Added.
(shouldBe):
(basic):
(spinUntilAdvance):
* Source/JavaScriptCore/dfg/DFGAbstractHeap.h:
(JSC::DFG::AbstractHeap::superKind):
* Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:
(JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
* Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::handleIntrinsicCall):
* Source/JavaScriptCore/dfg/DFGClobberize.h:
(JSC::DFG::clobberize):
* Source/JavaScriptCore/dfg/DFGCloneHelper.h:
* Source/JavaScriptCore/dfg/DFGDoesGC.cpp:
(JSC::DFG::doesGC):
* Source/JavaScriptCore/dfg/DFGFixupPhase.cpp:
(JSC::DFG::FixupPhase::fixupNode):
* Source/JavaScriptCore/dfg/DFGLoopUnrollingPhase.cpp:
(JSC::DFG::LoopUnrollingPhase::LoopData::isNumericComputationNode):
* Source/JavaScriptCore/dfg/DFGNodeType.h:
* Source/JavaScriptCore/dfg/DFGOperations.cpp:
(JSC::DFG::JSC_DEFINE_NOEXCEPT_JIT_OPERATION):
* Source/JavaScriptCore/dfg/DFGOperations.h:
* Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp:
* Source/JavaScriptCore/dfg/DFGSafeToExecute.h:
(JSC::DFG::safeToExecute):
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h:
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* Source/JavaScriptCore/ftl/FTLCapabilities.cpp:
(JSC::FTL::canCompile):
* Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:
(JSC::FTL::DFG::LowerDFGToB3::compileNode):
(JSC::FTL::DFG::LowerDFGToB3::compileCompareStrictEq):
* Source/JavaScriptCore/runtime/DateConstructor.cpp:
* Source/JavaScriptCore/runtime/Intrinsic.h:
Canonical link: https://commits.webkit.org/313578@main
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