ubuntu-sdk-bugs team mailing list archive

[Albert Astals Cid <albert.astals@xxxxxxxxxxxxx>]

Public bug reported:

I've traced down the creating of Audio items on the phone being slow 
~200 ms for first creation
 ~50 ms for subsequent creations
to AalMediaPlayerService::newMediaPlayer

This is a bit too much if an animation in QML ends up creating an Audio
component the animation will be very slow.

Also it's added startup time for apps that use Audio components.

One way to debug how much time takes to create an Audio component by
running http://paste.ubuntu.com/17155068/ with

qmlprofiler -fromStart qmlscene -I . ~/main.qml --desktop_file_hint
=webbrowser-app

let it run for a while and then enter "q"+Enter

that will save a qtd file that you can load later with qtcreator in
Analize->QML Profiler Options->Load QML Profile

** Affects: qtubuntu-media (Ubuntu)
     Importance: Undecided
         Status: Confirmed

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SDK bug tracking, which is subscribed to qtubuntu-media in Ubuntu.
https://bugs.launchpad.net/bugs/1590953

Title:
  Creating an Audio {} component is slow because of
  AalMediaPlayerService::newMediaPlayer

Status in qtubuntu-media package in Ubuntu:
  Confirmed

Bug description:
  I've traced down the creating of Audio items on the phone being slow 
  ~200 ms for first creation
   ~50 ms for subsequent creations
  to AalMediaPlayerService::newMediaPlayer

  This is a bit too much if an animation in QML ends up creating an
  Audio component the animation will be very slow.

  Also it's added startup time for apps that use Audio components.

  One way to debug how much time takes to create an Audio component by
  running http://paste.ubuntu.com/17155068/ with

  qmlprofiler -fromStart qmlscene -I . ~/main.qml --desktop_file_hint
  =webbrowser-app

  let it run for a while and then enter "q"+Enter

  that will save a qtd file that you can load later with qtcreator in
  Analize->QML Profiler Options->Load QML Profile

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