[Webkit-unassigned] [Bug 156390] New: The default inline self-repatchable code for our ICs is almost always the wrong choice

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156390

            Bug ID: 156390
           Summary: The default inline self-repatchable code for our ICs
                    is almost always the wrong choice
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

The most common get_by_id repatch if the property name is "length" is array.length.  The most common get_by_id repatch if the property name is not "length" is a prototype access, which may be megamorphic.  The most common put_by_id repatch is a transition.

Yet the default inline code for get_by_id is an inline self get and the default inline code for put_by_id is an inline self put.

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