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The Cost Of Running Compiz

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  • #46
    Everything seems to be slower with compiz; responsiveness, mouse cursor, web browsing...

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    • #47
      Originally posted by hax0r View Post
      Everything seems to be slower with compiz; responsiveness, mouse cursor, web browsing...
      While I do agree to some point there is some benefit to it, like the time it takes an application to load, is masked by the compiz animation for the window showing up on screen. Web browsing and mouse cursor has unnoticeable performance hits in most cases. I run a core 2 duo with a 9500gt with 3GB of rams. on lower end hardware I can see how compiz would affect browsing and the mouse cursor, I ran compiz on a G4 1.4Ghz with a radeon 9200 once, talk about slow. I have always liked the graying out of windows when something becomes unresponsive.

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      • #48
        Originally posted by Sacha View Post
        This article is a response to another article that shows Arch Linux having almost double the frame rate in a game compared to Ubuntu.

        They brushed it off saying it was due to Compiz.

        However, these results show quite the opposite. Worst case scenario, you're running nVidia and get a 20% performance drop.
        If you're using Intel, maybe a 15% performance drop.
        Using ATI and you're either gaining from Compiz or having no change at all.

        So where does this 40-50% performance drop come from in Ubuntu? I'm guessing you can't blame Ubuntu.

        So can you run the Arch vs Ubuntu videogame test again with Compiz on/off?
        Yeah I found it INCREDIBLY lazy that he just dismissed it as compiz's fault rather than simply re-running that test with compiz off.

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        • #49
          so what - compiz is a highly unstable product and installing/activating it by default was/is a desperate move by ubuntu and the gnome crowd. Why not just ignore the crap altogether?

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          • #50
            It would seem to me that Compiz almost "must" use more power. My interest is not in games but power efficiency. My system is a couple of years old now and uses an AMD 4850e, DDR2 ram, WD Green power, onboard ATI grahics (HD3200) and a 80Plus power supply. It idles at around 48w (just the box, excluding monitor etc) and rarely passes 60w in normal usage, even video rendering just makes it into the 70s.

            So the big test for me is how many extra watts are we using for just a few fade effects and shadows?

            Maybe an interesting next article for Phoronix.

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            • #51
              Here some BG info:
              http://smspillaz.wordpress.com/2010/...he-benchmarks/
              ..and that guy actually knows what hes talking about...

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              • #52
                1 more for Kwin compositing comparison

                As a long time Kubuntu user, I too would like to see a benchmark comparison between kwin and compiz.


                D.

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                • #53
                  Originally posted by Eazy View Post
                  I only play one game and that is UT2004. I have always needed to turn of Compiz when playing as I am a bit finicky when it comes to smooth gaming. Manually disable Compiz is not very convenient, so I used a script for that.

                  Code:
                  #!/bin/bash
                  
                  kwin --replace &
                  ut2004 ;
                  killall -s USR2 compiz.real
                  compiz --replace & 
                  exit 0
                  This will stop Compiz when you start UT2004 and start it again when you quit UT2004 automatically.

                  This script is for KDE so you would need to change "kwin" to "metacity" (and "UT2004" for a different game) if you use Gnome. It has been a long time since I used this script (used it when I used KDE3) so it might not work any longer.



                  Now I use KDE4 and I made this script:
                  Code:
                  #!/bin/bash
                  
                  kwriteconfig --file kwinrc --group Compositing --key Enabled false
                  kwin --replace &
                  ut2004 $@ ;
                  kwriteconfig --file kwinrc --group Compositing --key Enabled true 
                  kwin --replace
                  exit 0
                  This script will probably only work for KDE4. Perhaps it would help somebody.
                  You don't have to be so brute with kwin. Just ask nicely:
                  Code:
                  qdbus org.kde.kwin /KWin toggleCompositing
                  Interestingly, some time ago I was peeking at a friend's computer and I noticed that some applications do disable compositing on Windows 7. It made me laugh, because it seems that this is a problem everywhere

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                  • #54
                    or just hit alt+shift-F12 to toggle composite.

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                    • #55
                      Oh noes, that poor little kwin, i hope he get better soon. Are you sure, alt+shift-F12 really?

                      You know those ppl that only quote other ppl's howtos/scripts but never write anyone them selfe to help out?

                      Hope you understand my sarcasm...

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                      • #56
                        oh no, I only toggle composite once every couple of weeks. Quickly, I have to hack an overblown script!

                        Or I just hit the key combo.

                        Which I can programm into my keyboard.

                        So it is one single keypress...

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                        • #57
                          hehe......

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                          • #58
                            seriously,. 24 freely programmable keys with 10 layers (so 240 programmable positions) is just awesome...

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                            • #59
                              Originally posted by [Knuckles] View Post
                              Interestingly, some time ago I was peeking at a friend's computer and I noticed that some applications do disable compositing on Windows 7. It made me laugh, because it seems that this is a problem everywhere
                              Most of the time dwm.exe crashes.

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                              • #60
                                Originally posted by GNU/Blind View Post
                                Most of the time dwm.exe crashes.
                                Never seen any dwm crash. Broken ram perhaps?

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