Does Compiz Still Slow Down Your System?

[tacco]

Yes, it does. Nvidia Quadro 4600 fx.

[MuPuF]

Looking at those results, mostly on Nvidia side, makes me wonder how much efforts are being dedicated by Gallium3D team to improve performance on Gallium3D infraestructure.

Does anyone know if there is any work beeing done to improve Gallium3D infraestructure performance in the wild?

I didn't notice any special/cool patch for Gallium3D on 2.6.38. I could be wrong, and wish to Please correct me if i'm wrong....

How much effort in the Gallium3D architecture? As far as I know, not much. Work is happening on the gallium drivers.

But there are outstanding patches that entered the 2.6.38 (new memory manager, pageflip, zcompression) AND mesa (merge of the nvc0 code into the nv50) lately and that brought a really nice performance improvement

[pingufunkybeat]

Uh? I did lots of benchmarks with Gallium and Kwin-4.6 enabled/disabled and there was no difference at all when using full screen mode.

KWin always disables compositing for full-screen apps (like deanjo says, there is an option controlling this, and many distros use it by default).

[Marko M]

Compiz sucks for gaming

For me Compiz sucks when gaming both on Nvidia and Ati. Killing Compiz manually when entering game is such party breaker so I made scrips to do this automatically when entering game, and revert this when exiting game. Here are the scripts, hope someone finds them useful:

http://www.techytalk.info/2010/06/co...witch-scripts/

Cheers

[darkbasic]

I have noticed too that Compiz mostly doesn't decrease performance. However, KWin does and the difference can be huge.

Uh? I did lots of benchmarks with Gallium and Kwin-4.6 enabled/disabled and there was no difference at all when using full screen mode.

[devius]

Is it just me, or Radeon FOSS drivers are some like %50 of Catalyst. I don't know about lower resolutions, but at HD things are fantastic

That was also on my mind. On some tests it was even higher than that. Not bad at all.
Also, KWin tests as well would be great!

[DoDoENT]

While we are talking about performance impacts from composited environment, I have a question for all of you: do you have problem with watching a VDPAU accelerated video while composition is turned on?

I have such a problem on my GTX 470. While having kwin composition enabled, if I open a movie in SMplayer (or mplayer) configured to use VDPAU, X freezes after a while, or after skipping video (jumping to the middle of movie or similar), or sometimes immediately after starting video playback. This happens always while watching 720p or higher resolution videos, and sometimes even with smaller videos. Although X is freezed, key events are processed so I am able to pause playback (this unfreezes the X).

If I disable composition (suspend desktop effects), playback runs normally.

The system is Arch x64, with KDE 4.6, nvidia gtx 470, and default driver from Arch repository (260.19.44-1).

[Drago]

Is it just me, or Radeon FOSS drivers are some like %50 of Catalyst. I don't know about lower resolutions, but at HD things are fantastic

[droste]

EDIT: with/without KWin means with compositing (desktop effects) enabled/disabled

[droste]

Hi Michael,

I have noticed too that Compiz mostly doesn't decrease performance. However, KWin does and the difference can be huge. It would be cool if you made an article that compares:
- Gnome without Compiz
- Gnome with Compiz
- KDE without KWin
- KDE with KWin

I bet the numbers will be very interesting.

To see if KWin is to be blamed for this, you could remove one variable:
- KDE without KWin
- KDE with KWin
- KDE with Compiz