[Webkit-unassigned] [Bug 202661] Add support for Element Timing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=202661

Brent Fulgham <bfulgham at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bfulgham at webkit.org
         Resolution|---                         |WONTFIX

--- Comment #1 from Brent Fulgham <bfulgham at webkit.org> ---
As discussed in webkit-dev mailing list:

"Apple's WebKit team reviewed this API and we have a few concerns including
but not limited to:

   - The proposed API exposes timing at which a given element is painted.
   Implemented naively, this exposes the implementation detail of what kind of
   compositing tiles are used on a given web page. Hiding this
   implementation detail and recording the exact theoretical paint timing will
   be prohibitively expensive to do on all websites.
   - The definition of the set of owned text nodes and how they compute
   intersectionRect seems inadequate. It's unclear what "border box" of
   *Text* node would mean. The spec doesn't seem to ever populate "set of
   elements with rendered text" either.
   - The use of this API seems to incur a significant runtime as well as
   memory cost."

Moving to "RESOLVED | WONTFIX". We can reopen if we revisit this, or the spec issues are resolved.

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