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Does Compiz Still Slow Down Your System?

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  • phoronix
    started a topic Does Compiz Still Slow Down Your System?

    Does Compiz Still Slow Down Your System?

    Phoronix: Does Compiz Still Slow Down Your System?

    There have been a flurry of comments this week following my post why software defaults are important and why in the Linux benchmarks at Phoronix.com the tests are most often carried out in their default/stock configurations: it's what most everyone uses. There have been comments by Ted Ts'o on file-system default mount options and whether they are sane or not in the non-enterprise distributions and others have questioned if defaults like Compiz on in Ubuntu by default makes sense. Does using Compiz still hurt your graphics performance?

    http://www.phoronix.com/vr.php?view=15780

  • SciFiDude79
    replied
    Originally posted by pingufunkybeat View Post
    Nvidia blob does not suffer much from the extra blits required, as these are very optimised. Don't extrapolate from your system to everyobody.
    I extrapolated nothing. You took from my comment what you wanted to. Read my response again (this time more thoroughly) and you'll see that I pointed out that it was possibly due to the hardware I was running that I have no problems with Compiz.

    Leave a comment:


  • Amaranth
    replied
    Ubuntu does not enable metacity compositing by default so if things were at defaults metacity was not using compositing. Also, if things were kept default, compiz was not using the Unredirect Fullscreen Windows option (like the kwin option people keep talking about) so this was with full compositing overhead. We disabled that option because it causes too many other issues with screensavers activating while playing games and causing weird things to happen to non-game fullscreen applications.

    Leave a comment:


  • pingufunkybeat
    replied
    Originally posted by spirit View Post
    So, i really don't understand how phoronix can have twice more fps with compiz enabled.... (or maybe compositing is enabled in metacity)
    That's what I'm thinking. The issue is not Compiz itself, but the compositing environment, and if Metacity also composits (it has had this functionality since at least 2008), then it's no wonder that it's not faster.

    Leave a comment:


  • pingufunkybeat
    replied
    Originally posted by SciFiDude79 View Post
    I've read this all over the place, including on other Linux forums. "Compiz slows down your system" or "You can't play 3D games with Compiz." Who's coming up with this crap? I have 3 Linux systems installed on this computer, all of which run Gnome with Compiz enabled. I never have performance problems and I can play any games I want, including 3D games and I never notice a performance lag. Maybe it's my system, I am running a 1GB Nvidia graphics card and I have a dual core and 4 GB of system RAM, but I really don't know what all of the commotion about Compiz is. On my system, it works and it works well.
    Nvidia blob does not suffer much from the extra blits required, as these are very optimised. Don't extrapolate from your system to everyobody.

    Leave a comment:


  • that guy
    replied
    The news should have been called "Does Compiz Slow Down Your Games?"

    Leave a comment:


  • spirit
    replied
    I Had made benchmarks with openarena, on my radeon RV620 chipset, opensource r600g driver.

    (Archlinux with lastest mesa-git)

    and with compiz enabled, it's always slower.

    around 55fps without compiz (metacity without compositing? and 40fps with compiz enabled.
    Same for all games i had tried (Hon,alienarena,doom3,....)

    So, i really don't understand how phoronix can have twice more fps with compiz enabled.... (or maybe compositing is enabled in metacity)

    Leave a comment:


  • PsynoKhi0
    replied
    Originally posted by pingufunkybeat View Post
    They can handle much more complicated stuff than Quake3, though:

    Doom3
    Quake4
    Penumbra games
    Amnesia

    These are not open source, but that's an issue with open source games, and not open source drivers.
    Actually the code for the first Penumbra got open source as part of the first Humble Indie Bundle hitting the $1M mark (if I remember correctly... anyway )
    Assets aren't free-as-in-freedom though this is true for Urabn Terror too, right?

    So a benchmarking tool for Overture could be a project

    Leave a comment:


  • mtippett
    replied
    Originally posted by Wyatt View Post
    Interesting. I'd also be kind of interested in seeing the window manager tests expanded. Fluxbox, TWM, ratpoison, E17, etc.
    With PTS3/OpenBenchmarking, it's trivial to do.

    Configure your system to match the system configuration under test highlighted in the article (compiz/metacity). Repeat the results for your particular environment by running the test as shown below.

    Code:
    ./phoronix-test-suite benchmark 1103109-IV-COMPIZTES51
    That should give you a set of results that you can then compare to ensure that you have the same behaviour as Michael. Once you've got that confidence, your next step is to switch WM, re-run, etc. Note that the second question is really asking what the distinguished aspect of the system under test. You'd put in your WM there.

    Michael has started putting OpenBenchmarking.org links at the end of each article to let people play with the data. If your data is interesting, there might be a Phoronix review of the results, or a blog post on OpenBenchmarking.org

    Leave a comment:


  • mtippett
    replied
    Originally posted by SciFiDude79 View Post
    I've read this all over the place, including on other Linux forums. "Compiz slows down your system" or "You can't play 3D games with Compiz." Who's coming up with this crap? ...
    It's a meme, meme transcend time and space. It may have been true once, but isn't true in all cases now. Unfortunately, meme removal is extremely painful and extremely slow...

    But Michael's intent of the article was to dispell these issues.

    Note that most of the talk now focuses on kwin's impact. The cycle continues...

    Leave a comment:

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