Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: c496281388179096571a5bf8d23d89bb74e986ac
      
https://github.com/WebKit/WebKit/commit/c496281388179096571a5bf8d23d89bb74e986ac
  Author: Sosuke Suzuki <[email protected]>
  Date:   2025-10-19 (Sun, 19 Oct 2025)

  Changed paths:
    A JSTests/microbenchmarks/promise-prototype-catch.js
    M Source/JavaScriptCore/builtins/PromisePrototype.js
    M Source/JavaScriptCore/inspector/InjectedScriptSource.js
    M Source/JavaScriptCore/runtime/JSPromisePrototype.cpp

  Log Message:
  -----------
  [JSC] Implement `Promise.prototype.catch` in C++
https://bugs.webkit.org/show_bug.cgi?id=301022

Reviewed by Yusuke Suzuki.

This patch changes to implement `Promise.prototype.catch` in C++ same as 
`Promise.prototype.then`.

DFG/FTL enabled:
                                         TipOfTree                  Patched

        promise-prototype-catch        6.8142+-0.5325     ^      5.4118+-0.4242 
       ^ definitely 1.2591x faster

DFG/FTL disabled:
                                         TipOfTree                  Patched

        promise-prototype-catch       17.1595+-0.6856     ^      6.0762+-0.3540 
       ^ definitely 2.8241x faster

Test: JSTests/microbenchmarks/promise-prototype-catch.js

* JSTests/microbenchmarks/promise-prototype-catch.js: Added.
(i.Promise.reject.i.catch):
* Source/JavaScriptCore/builtins/PromisePrototype.js:
(catch): Deleted.
* Source/JavaScriptCore/inspector/InjectedScriptSource.js:
(let.InjectedScript.prototype._forEachPropertyDescriptor.createFakeValueDescriptor):
* Source/JavaScriptCore/runtime/JSPromisePrototype.cpp:
(JSC::JSPromisePrototype::finishCreation):
(JSC::JSC_DEFINE_HOST_FUNCTION):

Canonical link: https://commits.webkit.org/301784@main



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