[Webkit-unassigned] [Bug 62006] New: Web Inspector: move Network panel to an iframe

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=62006

           Summary: Web Inspector: move Network panel to an iframe
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: caseq at chromium.org
                CC: timothy at apple.com, rik at webkit.org, keishi at webkit.org,
                    pmuellr at yahoo.com, joepeck at webkit.org,
                    pfeldman at chromium.org, yurys at chromium.org,
                    bweinstein at apple.com, apavlov at chromium.org,
                    loislo at chromium.org


Network panel uses large amount of CSS that is mostly independent on the rest of the inspector. Moving a panel into iframe allows to decrease both number of HTML elements and number of CSS rules in a frame, thus largely reducing CSS rule matching time.
On a primitive test (inspector on techcrunch.com), median time NetworkPanel.show() takes was reduced from 71ms to 9ms, first-time NetworkPanel show time went down from 1.6s to 1s, and for Scripts panel (untouched), median show time went from 88ms to 15ms.

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