[Webkit-unassigned] [Bug 105919] New: Stylesheets that don't match current viewport etc. are no longer deferred

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105919

           Summary: Stylesheets that don't match current viewport etc. are
                    no longer deferred
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dajdavies at gmail.com


Previous versions of WebKit deferred loading stylesheets where the media query didn't match viewport, orientation etc.

This waterfall illustrates the behaviour in Chrome 23 - http://www.webpagetest.org/result/130102_CQ_0f4cca3d4aa1dff79941bb64eda548c9/1/details/ - where big.css is deferred, due to  media="screen and (min-width : 1200px)"

In Chrome 26, big.css is no longer deferred and so is competing for the network with other resources - http://www.webpagetest.org/result/130102_KJ_2079b3c622753c392584f48052d8a01c/1/details/

Also tested in r138591

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