[Webkit-unassigned] [Bug 52847] New: Lots of overridden css background images are unnecessarily loaded

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52847

           Summary: Lots of overridden css background images are
                    unnecessarily loaded
           Product: WebKit
           Version: 525.x (Safari 3.2)
          Platform: PC
               URL: http://www.wsj.com
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Major
          Priority: P1
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luying.pan at gmail.com


Created an attachment (id=79656)
 --> (https://bugs.webkit.org/attachment.cgi?id=79656&action=review)
Screen shots of the Inspector showing the CSS rule being overriden, but the background image was still downloaded, and the actual HTML code that produces the problem

See my attachment. Basically if you try to load wsj.com, there are many images that are css background-images which are actually overridden (not used) in the css, but are still downloaded by webkit. IE, Firefox, and Chrome do not do this. I've verified this behavior in both Safari, and Arora, which means it's not an issue with any specific port.

The attachment contains screen shots from the inspector and the actual HTML code which produces the problem.

hat_arrowBlue.gif is the file which should not have been downloaded. But if you look at the resource screen shot, you'll see the file was indeed downloaded. 

This is bad for bandwidth-limited environments.

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