ubuntu-webapps-bugs team mailing list archive

[Olivier Tilloy <olivier.tilloy@xxxxxxxxxxxxx>]

Public bug reported:

In order to optimize the startup time of webbrowser-app, I looked into
instantiating WebView with Component.incubateObject(…) (see http://qt-
project.org/doc/qt-5/qml-qtqml-component.html#incubateObject-method)
instead of Component.createObject(…).

However for some reason the incubation always happens synchronously. I’m
attaching a couple of examples that demonstrate this (one using
Component.incubateObject(…), the other one using a Loader with
asynchronous set to true, both instantiate the WebView synchronously).

If we could instantiate WebViews truly asynchronously, that would avoid
blocking rendering while the webview is instantiated. Currently, on a
reference device, instantiating a WebView takes between 300 and 400ms to
instantiate, and no rendering happens during that time.

** Affects: oxide
     Importance: Undecided
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1359911

Title:
  Cannot instantiate a WebView asynchronously

Status in Oxide Webview:
  Confirmed

Bug description:
  In order to optimize the startup time of webbrowser-app, I looked into
  instantiating WebView with Component.incubateObject(…) (see http://qt-
  project.org/doc/qt-5/qml-qtqml-component.html#incubateObject-method)
  instead of Component.createObject(…).

  However for some reason the incubation always happens synchronously.
  I’m attaching a couple of examples that demonstrate this (one using
  Component.incubateObject(…), the other one using a Loader with
  asynchronous set to true, both instantiate the WebView synchronously).

  If we could instantiate WebViews truly asynchronously, that would
  avoid blocking rendering while the webview is instantiated. Currently,
  on a reference device, instantiating a WebView takes between 300 and
  400ms to instantiate, and no rendering happens during that time.

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