[Webkit-unassigned] [Bug 62590] New: REGRESSION(r82934-r83016): Non-parallel downloads of linked stylesheets with media attribute

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=62590

           Summary: REGRESSION(r82934-r83016): Non-parallel downloads of
                    linked stylesheets with media attribute
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://jsbin.com/ajigu4
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P1
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bran_johnson at hotmail.com


Created an attachment (id=96996)
 --> (https://bugs.webkit.org/attachment.cgi?id=96996&action=review)
Reduced Test Case

The WebKit nightly for Windows r82934 downloads linked stylesheets with a media attribute in parallel. The WebKit nightly for Windows r83016 does not download the linked stylesheets with media attributes in parallel.

Steps to reproduce:
1. Open the Network panel of the Web Inspector.
2. Load the linked jsbin page or the attached reduced test case.
3. Note the stylesheet resources loaded from hang.nodester.com

The hang.nodester.com server waits two seconds before sending a response. This makes it easy to see the stair-stepping pattern (on r83016 and on) indicating the browser is waiting for the previous stylesheet to download before downloading the next. In r82934, the stylesheets download in roughly the same amount of time.

I looked at the changes (http://trac.webkit.org/?from=04%2F06%2F2011&daysback=1&changeset=on&wiki=on&update=Update), and the one that looks to me like it could have changed this behavior is <http://trac.webkit.org/changeset/82951>.

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