Re: Ubuntu is slow.
The Unity Dash uses semi-transparency which requires decent 3D.
What graphics card do you have, and have you installed a proprietary driver for it?
Also, check System Monitor to be sure that there's no buggy program in the background eating your CPU time.
As a measure, the first time I open the Dash it probably takes a second or so to open and fill up. Subsequent times, it's about a quarter of a second; near instant. This computer is a Core 2 Duo with Nvidia GTX260 on the proprietary Nvidia driver. One hard disk for programs, the other for files; no SSD.
Last edited by 3rdalbum; February 5th, 2013 at 12:47 PM.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.