QtWebEngine loads very slowly
by Geremia from LinuxQuestions.org on (#5H4Q5)
I'm experience incredibly slow loading times for QtWebEngine, which causes Calibre's ebook-viewer several seconds just to load a simple, small EPUB. From MobileRead forum:
Code:$ QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu --enable-logging=stderr --v=0" calibre-debug -w *.epub
[0.000] Load of book started
[0.005] prepared emitted
[0.232] webview loading requested
[3.239] bridge ready
[5.279] loading finished
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 196.0 x 196.0
physicalDpi: 162.56 x 161.36470588235292
Using calibre Qt style: TrueQt 5.15.2
KDE Frameworks 5.81.0
KDE Plasma 5.12.4
Graphics card: NVIDIA GK208B [GeForce GT 710], Nouveau driver
Code:$ QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu --enable-logging=stderr --v=0" calibre-debug -w *.epub
[0.000] Load of book started
[0.005] prepared emitted
[0.232] webview loading requested
[3.239] bridge ready
[5.279] loading finished
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 196.0 x 196.0
physicalDpi: 162.56 x 161.36470588235292
Using calibre Qt style: TrueQt 5.15.2
KDE Frameworks 5.81.0
KDE Plasma 5.12.4
Graphics card: NVIDIA GK208B [GeForce GT 710], Nouveau driver