[Webkit-unassigned] [Bug 143239] No way to quickly make non-enumerable instance properties

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143239

--- Comment #2 from Filip Pizlo <fpizlo at apple.com> ---
That's super interesting.  I think that the main problem is that making a property non-enumerable doesn't involve a cached transition.  This means that if you make something non-enumerable, all accesses to the object go slow after that.

Once we fix that, then the next problem is that the call to make it non-enumerable is not intrinsic.  We should make that call be intrinsic.

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