[Webkit-unassigned] [Bug 162108] New: [JSC] Add a new byte code op_define_property instead of calling defineProperty from parser

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=162108

            Bug ID: 162108
           Summary: [JSC] Add a new byte code op_define_property instead
                    of calling defineProperty from parser
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com

We now sometimes call defineProperty to set class methods etc.
But, it's super costly because it creates a new object for property descriptor.
This object is always allocated because defineProperty host function escapes it even in FTL.

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