[Webkit-unassigned] [Bug 32259] New: Painting divs with css style border-bottom dotted slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32259

           Summary: Painting divs with css style border-bottom dotted slow
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zdwang at google.com
                CC: jamesr at google.com


Created an attachment (id=44451)
 --> (https://bugs.webkit.org/attachment.cgi?id=44451)
Examples for the bug

It seems repainting divs with css style border-bottom is really slow. The
effects of that is it causes typing in content editable lag.


Slow: test2.html

Type in the div that I've made contentEditable and it's got garbal in it.
Notice the lag in typing, where characters still come out after you've finished
bashing your keyboard. This is particularly obvious on the chrome/linux.

Fast: test.html

Do the same above and notice NO lag in typing.

Notes:

The only difference between the 2 is the fast version uses border-bottom solid
instead of dotted.

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