[Webkit-unassigned] [Bug 52711] New: Performance issue while inserting CSS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52711

           Summary: Performance issue while inserting CSS
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://www.extractwidget.com/mindex2test2.php
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: avitte at infonais.fr


This might be linked to bug 52561, while testing the workaround we posted for this bug, we discovered that CSS insertion is really slower with webkit compared to other browsers (FF for example)

This can be seen on http://www.extractwidget.com/mindex2test2.php (enter "parquet castorama" then OK), for each gadget the code before the alert is :

var d0=(new Date).getTime();

for (var i=0;i<currentCSS.length;i++) // currentCSS= array of CSS objects (LINK, STYLE)
{
zhead.$a(currentCSS[i]); //append CSS object to the head
};

alert((new Date).getTime()-d0);

As we can see the returned time for webkit based browsers is much higher than the one returned by FF for example.

On mobile devices, the returned time is in average 3 to 4 seconds per gadget on the iPhone 3G (!!!), 1s on android

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