Unity gets slow if 3+ apps are running

[Omer Akram]

Image 93 + Fix for bug 1235190

If I have only one app is running everything is super fast. Dash scrolling is really smooth and other navigation in the Dash is also fast but if I have multiple apps opened things start to get slow. As you open the third app things get slow.

1. open camera
2. open gallery
3. open dialer
4. come back to dash and scroll

What happens: scrolling is pretty laggy

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity8 7.82+13.10.20131010-0ubuntu1 [modified: usr/share/unity8/Components/ListItems/Header.qml]
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.5-0ubuntu1
Architecture: armhf
Date: Fri Oct 11 18:43:02 2013
InstallationDate: Installed on 2013-10-10 (0 days ago)
InstallationMedia: Ubuntu Saucy Salamander (development branch) - armhf (20131010.2)
MarkForUpload: True
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)

[Michał Sawicz (saviq)]

We need to look across the involved projects to see where we can improve.

[Daniel van Vugt (vanvugt)]

This is mostly bug 1227739. But as always, keep an eye on:
https://bugs.launchpad.net/mir/+bugs?field.tag=performance

[Omer Akram (om26er)]

I would like to mention that I don't see any CPU spike when this problem happens unlike other duplicates of bug 1227739

[Daniel van Vugt (vanvugt)]

That's not surprising, since it should only be the GPU that we're over-using.