Linux Today: Linux News On Internet Time.
Search Linux Today
Linux News Sections:  Developer -  High Performance -  Infrastructure -  IT Management -  Security -  Storage -
Linux Today Navigation
LT Home
Contribute
Contribute
Link to Us
Linux Jobs


Top White Papers

More on LinuxToday


The Cost Of Running Compiz

May 21, 2010, 17:03 (0 Talkback[s])
(Other stories by Michael Larabel)

"Earlier this week we published benchmarks comparing Arch Linux and Ubuntu. There were only a few areas where the two Linux distributions actually performed differently with many of their core packages being similar, but one of the areas where the results were vastly different was with the OpenGL performance as Ubuntu uses Compiz by default (when a supported GPU driver is detected) where as Arch does not. This had surprised many within our forums so we decided to carry out a number of tests with different hardware and drivers to show off what the real performance cost is of running Compiz as a desktop compositing manager in different configurations.

"Even when OpenGL games and benchmarks are running full-screen, in some configurations there still is a penalty imposed by Compiz. Compiz does not stop itself when a game or application is running full-screen even though you are not using any Compiz plug-ins or desktop effects and as such, indirect rendering is still being used. Albeit using a compositing window manager can be of some benefit when running a full-screen OpenGL program as it can lead to faster alt-switching and some other advantages, but for most users running Compiz with a full-screen application is not needed and can simply lead to a drop in performance due to the indirect rendering and additional steps taken with the compositing window manager on Linux."

Complete Story

Related Stories: