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  1. Qt
  2. QTBUG-93377

slow initialization of multiple script contexts

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Details

    • Bug
    • Resolution: Incomplete
    • P2: Important
    • None
    • 5.15.2
    • WebEngine
    • None
    • Slackware-current
      Linux 5.12.0
      Plasma 5.21.4, KDE frameworks 5.81.0
      Qt 5.15.2
      NVIDIA Driver Version: 460.73.01 (got the same problem using Nouveau driver, too)
      GPU: GeForce GT 710
    • Linux/X11

    Description

      QTWEBENGINE_CHROMIUM_FLAGS="--enable-logging --log-level=0 --v=1" calibre-debug -w *.epub

      takes several seconds to initialize 6 script contexts, throwing "ERROR:paint_controller.cc(646)" and "A context is created NOT from snapshot" errors and destroying then recreating contexts (multiple "Destroyed context for extension" before everything is setup and ready for rendering HTML). Also, --disable-gpu doesn't speed things up.

      See the attached logs comparing Calibre's ebook-viewer's vs. quicknanobrowser's loading/initialization times.

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            qt_webengine_team Qt WebEngine Team
            geremia Alan Aversa
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            Dates

              Created:
              Updated:
              Resolved:

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