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How Unity, Compiz, GNOME Shell & KWin Affect Performance

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  • bleubugs
    replied
    Please try E17

    Could you try against E17 composite manager (trying with both Software and OpenGL would be interesting to know also) ?

    Leave a comment:


  • Wyatt
    replied
    Originally posted by allquixotic View Post
    The release quality of a rc1 of Linux is equivalent to a pre-alpha of any other software.
    So you're saying pre-alpha means beta in your world...

    Michael, I think you mentioned that Metacity isn't a compositing WM in the article... might want to fix that.

    It's pretty interesting that the oldest Gnome WM and KWin are the most resilient. I guess investing in stability has tangible benefits! :3

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  • allquixotic
    replied
    To be fair, testing out 3.0-rc1 is like taking a random VCS snapshot of the Catalyst driver about a week into the development of a new release stream (before even a beta is available). The release quality of a rc1 of Linux is equivalent to a pre-alpha of any other software. Reporting the issues you have is a good thing, but the quantitative results (or the absence thereof, due to breakage) are less meaningful until we get a few rounds of bug-fixing.

    IMHO you should have reverted to the stable 2.6.39 series for the open-source driver testing, as soon as you realized that there was serious breakage with 3.0-rc1. My experiences with r600g on 2.6.39 aren't nearly as broken as you describe; at the very least, compiz, unity, mutter and metacity all work without rendering issues or significant performance problems.

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  • Cyborg16
    replied
    Originally posted by chickenlinux View Post
    I'm shocked that KDE is doing the best. I'd like to see a *box window manager up there...
    KDE? There's no reason it shouldn't perform well in benchmarks like this as far as I know, as long as the system doesn't run out of RAM or run into a bug of some kind. This is more a measure of how much the different desktop shells/compositors can keep out of the way when not in use than a measure of how fast the compositor can paint windows or the desktop applications can run, hence why quite a few of the results are quite similar.

    The few instances where KDE with the nvidia driver is significantly faster than other shells is a bit anomalous though ? then again all the other shells are based on the gnome desktop.

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  • chickenlinux
    replied
    I'm shocked that KDE is doing the best. I'd like to see a *box window manager up there...

    Leave a comment:


  • torturedutopian
    replied
    Oops, it seems an important factor was forgotten...

    You didn't mention, in the test, the use of the Compiz or KWin options that disable compositing for fullscreen apps, thus games !

    * By default, KWin turns off compositing for fullscreen apps and should be as fast as Metacity (don't know why it turns out to be faster ?!). This option is great but makes the screen flicker a little when switching from windowed to fullscreen mode. In the future, there will be an API, apparently, so that apps can tell if they are more demanding or not, and if compositing should be switched off or not. (way to go, IMHO !)

    * By default, Compiz doesn't and you have to install "ccsm" and tick "undedirect fullscreen apps" and you want to play games with the most FPS.

    I'm pretty sure KWin would not be faster than Compiz, if that was taken into account. (well, there will be MUCH performance improvement in KDE 4.7, too)
    Last edited by torturedutopian; 30 May 2011, 06:38 AM.

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  • kokoko3k
    replied
    What kind of compositing is in use by kwin?
    I only use xrender.

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  • Jakob.Lundberg
    replied
    Very interesting.

    Would it be possible to include openbox in the test?
    As Lubuntu is known as a fast desktop system, it would be nice to know if this is true regarding graphics performance as well.

    Leave a comment:


  • Cyborg16
    replied
    Nice. Any chance you can run a similar benchmark looking at idle CPU usage and power usage? I remember Martin Gr??lin saying a little while back that kwin's power usage with desktop effects on shouldn't be any higher than with them off, but that's not been my experience (nvidia driver). Anyway, would be interesting to see how all these compare on power management.

    Leave a comment:


  • Ard Righ
    replied
    Have you tried benchmarking Gnome Shell & Mutter on Fedora 15?

    Do people actually use GNOME Shell with the Unity desktop?

    Leave a comment:

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