Hello Linux Geeksters. The Mir Display Server receives an important performance fix, that forbids the surfaces that are hidden by windows to be rendered. On Ubuntu Touch, the Clock App re-renders the screen every second in order to display the time, and this is still noticable even when the app is sent in the background or covered by other windows.
This was a big deal on mobile phones, because it caused both performance overhead ad battery life decrease.
For those who don’t know yet, Mir is a new display server, created by the Canonical developers as a replacement for the X.org Server. For performance and stability reasons, it has not been integrated on Ubuntu 13.10 Saucy Salamander which has been recently released, but it debuted successfully on Ubuntu Touch 1.0, the mobile version of the Ubuntu Linux system.
Mir has support only for the open-source graphics cards, but if Canonical finds a solution to make their display server compatible with the proprietary drivers until April 2014, Mir may be used as default on Ubuntu 14.04 Trusty Tahr and so, the Ubuntu Desktop and Ubuntu Phone convergence may be achieved with Ubuntu 14.04.