Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: ff7f706b1d907c0c1fe8b55d4a6459e3cd4496c9
https://github.com/WebKit/WebKit/commit/ff7f706b1d907c0c1fe8b55d4a6459e3cd4496c9
Author: Alexey Shvayka <ashva...@apple.com>
Date: 2023-03-23 (Thu, 23 Mar 2023)
Changed paths:
M Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
Log Message:
-----------
[JSC] Refine DFG AI type speculations for GetInternalField when called on
ProxyObject
https://bugs.webkit.org/show_bug.cgi?id=254271
<rdar://problem/107056889>
Reviewed by Yusuke Suzuki.
This change refines type speculations for [[ProxyTarget]] and [[ProxyHandler]]
internal fields
as their types are guaranteed by the ECMA-262, getting rid of SpecBytecodeTop,
which enables downstream
optimizations in IC helpers for ProxyObject's "has" and "get" traps,
progressing microbenchmarks by 6-10%.
microbenchmarks/proxy-get-miss-handler.js speedup probably slighly affects
Speedometer2/Flight-TodoMVC.
This very optimization may be applied to other object types, including Promise.
ToT patch
proxy-has-hit 4.9520+-0.0588 ^ 4.6705+-0.0609 ^
definitely 1.0603x faster
proxy-has-miss-handler 5.0585+-0.0674 ^ 4.7937+-0.0778 ^
definitely 1.0552x faster
proxy-get-miss-handler 17.1412+-0.1817 ^ 15.5256+-0.1962 ^
definitely 1.1041x faster
* Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:
(JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
Canonical link: https://commits.webkit.org/262054@main
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