[UbuntuShape] repeated setting/unsetting the image badly impacts rendering performance

[Michael Zanetti]

Frequent setting/unsetting of the image in an ubuntu shape badly impacts the rendering performance. This can be seen in this branch (https://code.launchpad.net/~mzanetti/unity/phablet-unload-far-away-images/+merge/160083) where we try to unload invisible images in order to save some memory.

Attached you can find a simple qml file that lets you reproduce the issue. It contains a Flickable and a UbuntuShape in it. First, try flicking it up and down. It'll be smooth. Then, click on the image. This removes and sets the image 100 times. Try the flicking again and you will notice a drop in performance. Repeat for a couple of times and the problem will get worse and worse.

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:ubuntu-ui-toolkit at revision 617, scheduled for release in ubuntu-ui-toolkit, milestone Unknown

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-ui-toolkit - 0.1.46+13.10.20130712-0ubuntu1

---------------
ubuntu-ui-toolkit (0.1.46+13.10.20130712-0ubuntu1) saucy; urgency=low

  [ Kaleo ]
  * Removed unused artwork.
  * Added experimental dark & gradient themes.
  * Reverted standard easings to Quad because it seems
    QEasingCurve::BezierSpline does not ensure the target value is
    always reached. (LP: #1199662)

  [ Loïc Molinari ]
  * [UbuntuShape] Prevented dangling nodes in the scene graph. (LP:
    #1180794)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 618
 -- Ubuntu daily release <email address hidden> Fri, 12 Jul 2013 04:02:24 +0000