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Canonical Continues Working On XMir Performance

Ubuntu

Published on 15 July 2013 01:30 PM EDT
Written by Michael Larabel in Ubuntu
174 Comments

Canonical's Christopher Halse Rogers wrote a blog post over the weekend to try to clear up the XMir performance situation and say that Canonical engineers are working on improving the performance, as users begin to discover there's a performance hit in using XMir.

Christopher Halse Rogers basically says that a lot of testing is happening, 10~20% performance drops right now are expected over raw X, and they hope to better the performance. In particular, composition bypass is a major performance win for full-screen applications by not having the unity-system-compositor do extra compositing work, but that code isn't ready yet. There's also some performance hits due to differences in the rendering models between X and Mir. Last but not least, there's some X cursor work to address.

The blog post can be read in full here.

On a semi-related note, Matthew Garret is also out today with a XMir blog post. His latest blog post concludes with, "XMir on Mir in Ubuntu provides no user benefits and isn't a compelling technology demo. Mir itself will permit a range of additional features, but isn't slated to be running a user session itself until 14.10. The only obvious benefit to Canonical in shipping XMir on Mir is to gain additional testing, which makes using it in 14.04, a supposedly stable and long term release, a somewhat surprising choice."

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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