[Webkit-unassigned] [Bug 77210] New: [Qt] Loading a webpage is slow and lock the UIProcess.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77210

           Summary: [Qt] Loading a webpage is slow and lock the UIProcess.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: Qt, QtTriaged
          Severity: Major
          Priority: P1
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: alexis.menard at openbossa.org
                CC: kenneth at webkit.org, jocelyn.turcotte at nokia.com,
                    noam.rosenthal at nokia.com


Hi,

If you try and compile https://github.com/snowshoe/snowshoe , loading a page like yahoo, google or planetkde.org will be slow. Around the end of the loading the UIProcess get stuck and you can't even click on the UI. It kills a bit the concept of responsiveness of WK2. Snowshoe is using the desktop mode (which we need to have in correct shape as it runs our layout tests). I profiled quickly, it seemed related to re-sizing the drawing area too much or incorrectly. Also I feel very surprised that the loading doesn't look progressive (text, then image, ...) like Chrome or Safari. It loads, let the page blank and when everything is there (after being stuck) it display the entire page.

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