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  1. Qt
  2. QTBUG-46516

Windows: WebEngine connections huge delays



    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Duplicate
    • Affects Version/s: 5.4.2
    • Fix Version/s: None
    • Component/s: WebEngine
    • Labels:
    • Environment:
      Windows 7 (32bit). Vmware or real PC. NIC


      Build simple program that used websockets to connect to my websocketserver. Server on address

      I use WebEngine for viewing bug and WebView for control.
      When network fully configured - setted real default gateway (and maybe something else) - all ok.
      When network not properly configured - resetted default gateway - i see huge delays:

      WebView: fast connection (fractions of seconds)

      WebEngine: 5 second on every connect on test program. (up to 25 second on real application).

      Chrome (load html-page with javascript directly) - fast connection (fractions of seconds).

      Firewall are disabled.
      Netcat fast connecting to server.

      Changing server address from 127.0.1 for real network address not resolve problem.

      When shutdown network interface - I see fast connect.

      Its a really big problem because I don't see any doc for additional cooking
      WebEngine for work instead official doc. where not described this situation.

      Users cannot wait 5-25 seconds for establishing connection to localhost.


        1. bad network.png
          bad network.png
          147 kB
        2. bad network2.png
          bad network2.png
          42 kB
        3. chrome.png
          35 kB
        4. fast connect from webview.png
          fast connect from webview.png
          31 kB
        5. slow connect from webengine.png
          slow connect from webengine.png
          24 kB
        6. TestConnect.zip
          6 kB
        7. web.zip
          5 kB

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              • Assignee:
                kkohne Kai Köhne
                Yaroslav Yaroslav
              • Votes:
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                4 Start watching this issue


                • Created:

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