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KWin Can Cause A Performance Hit Too, But It's Different From Compiz

May 24, 2010, 18:33 (0 Talkback[s])
(Other stories by Michael Larabel)

"Last week we published Arch Linux vs. Ubuntu benchmarks to finally lay to rest that for the overall system performance the speed of the rolling Arch Linux distribution is not too different from that of Ubuntu when running with similar package versions. One of the areas, however, where the performance was different with the "out of the box" experience was the OpenGL gaming where Ubuntu was using Compiz by default where as Arch had Metacity. This surprised many so we published another article entitled The Cost Of Running Compiz where we showed the performance penalties of a compositing window manager with different hardware and drivers. This led some to ask whether the performance of KWin also causes the OpenGL frame-rate to drop, so here are those KDE benchmarks.

"Our KWin testing was done with the same hardware and software as last week's tests. This included an Intel Core i3 530 processor clocked at 3.32GHz, an ECS H55H-M motherboard, 2GB of system memory, and a 65GB OCZ Vertex SSD. When testing the Intel graphics we used the integrated Clarkdale graphics, for the ATI graphics we used a Radeon HD 4830 graphics card, and for the NVIDIA graphics was a GeForce 9800GT. The testing was done on a stock Kubuntu 10.04 installation with the Linux 2.6.32-21-generic x86_64 kernel, KDE 4.4.2, X.Org Server 1.7.6, Mesa 7.7, xf86-video-intel 2.9.1, xf86-video-ati 6.13.0, Catalyst 10.4, and NVIDIA 195.36.15 drivers."

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