Ubuntu 13.04 improves graphics performance to help phones and tablets
We found out this past week that Ubuntu Touch for phones and tablets had gotten a bump of its daily builds, so the daily builds were based on Ubuntu 13.04 (Raring Ringtail) rather than 12.10. Now, we're finding out just what kind of improvements have been put into Raring Ringtail that will help out mobile users in the future.
A big part of the 13.04 upgrade has been a much smoother Unity interface, and better performance. A lot of that is based on the improvements made in an effort to make the OS better for "lightweight systems", which is the initial aim for Ubuntu Touch. Canonical said about the update:
Ubuntu Touch is planned to start life in emerging markets on low-cost handsets, so this update is laying the foundation for much better performance on those devices. This is still early work though, because Ubuntu Touch isn't planned for wide release until Ubuntu 14.04 comes out in April of next year.
source: Ars Technica