[Webkit-unassigned] [Bug 85469] New: Typing is very slow in the first line of contentEditable div

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85469

           Summary: Typing is very slow in the first line of
                    contentEditable div
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yuriy.brayko at gmail.com


We faced a wierd typing performance issue. In the first line of the first contentEditable div element typing speed is very low. The problem occurs only in Safari on Mac. 

We found that the root of the issue is -webkit-user-select style.

body {   
    -webkit-user-select: none;
}

*[contentEditable='true']{
    -webkit-user-select: auto;
}

If the first style is removed the issue is gone. But it's not only the style itself. Looks like it is a combination of -webkit-user-select plus something else because we could not reproduce the problem on simple test page.

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