OK, this is going to be a long one. During these days I've taken some time to perform some benchmarks in my system (Dell D830 with Nvidia Quadro NVS 140M). The system is an up-to-date 12.04, running NVIDIA driver version 295.49. Vsync was enabled in the drivers; compiz refresh rate was forced to 60Hz to prevent wrong refresh rate detection.
I benchmarked gnome-classic with metacity, gnome-classic with compiz, gnome-shell, Unity 3D, and Unity 2D against GlMark, Unigine, and 3DMark 2001. The reason of the last benchmark is that I'm having e a lot of trobles running LIMBO at a decent framerate under Unity, while I have no problem under gnome-classic with metacity. So before filing a new bug I thought about profiling it through a similar WINE program. Also, for the compiz benchmarks, I tried with and without the "Force full screen redraws" workaround. Please find the spreadsheet attached. OVERALL RESULTS: 1) gnome-classic without effects is always the best performer 2) "Force full screen redraws" does bad: it gives -50% performances in some cases 3) Unity 3D is a worse performer than standalone compiz (below 5% however) 4) Opening the dash in Unity 3D has a certain impact on performances (below 10% however) 5) Gnome shell performs slightly better than Unity 3D 6) Unity 2D performance is sub-par OTHER CONSIDERATIONS: 1) At least in my system, I've always felt that any composited environment has a big impact in performances. I can see it even in 2D applications: take firefox, where scrolling certain pages (eg: ossblog.it) is very sluggish. Now this is confirmed by numeric results. The question is: do you think it's normal, or it is just an NVIDIA driver issue? 2) I have also measured the memory usage in the several cases. There actually is a slight correlation between memory usage and performance. 3) The 3DMark 2001 25% drop from metacity to Unity 3D confirms the problem I am having with LIMBO. However, I feel that the drop is even higher, "at sensation". Do you think I need to file a new bug? ** Attachment added: "benchmark.ods" https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3183383/+files/benchmark.ods -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/988079 Title: Much slower OpenGL frame rates with unityshell loaded, than plain compiz To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/988079/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
