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[Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>]

This is the relevant debug output while the stuttering occurs.

qtmir.surfaces: MirSurface["webbrowser-app"]::stopFrameDropper()
qtmir.applications: Application::setInternalState - appId= "webbrowser-app" state= SuspendingWaitProcess
qtmir.applications: TaskController::suspend - appId= "webbrowser-app"
qtmir.applications: Application::setInternalState - appId= "webbrowser-app" state= Suspended
qtmir.applications: ApplicationManager::onAppDataChanged: Received  "state"  update "webbrowser-app"


** Package changed: unity8 (Ubuntu) => qtmir (Ubuntu)

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Touch seeded packages, which is subscribed to unity8 in Ubuntu.
https://bugs.launchpad.net/bugs/1518935

Title:
  When an application is suspended or closed it causes a large UI
  stutter

Status in Canonical System Image:
  New
Status in qtmir package in Ubuntu:
  Confirmed

Bug description:
  When an application is suspended or closed it causes a large UI
  stutter.

  What happened:
  1) Open multiple applications (eg Browser and Music)
  2) Switch from Browser to Music
  3) Scroll up/down a listview
  4) Around 2 seconds after switching from Browser to Music the process is suspended and it can be observed that a UI stutter occurs

  What I expected to happen:
  At step 4) for there to be no stutter in the UI

  Note that this also occurs if you close an application, and happens
  when switching from an application to the scopes.

  
  $ system-image-cli -i
  current build number: 169
  device name: mako
  channel: ubuntu-touch/rc-proposed/bq-aquaris.en
  last update: 2015-11-23 01:08:21
  version version: 169
  version ubuntu: 20151120.1
  version device: 20150911
  version custom: mako-1.1

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