[ggreer]

Have you tried to troubleshoot the cause of this slowness? What you describe is not normal behavior for any OS. Some aspect of your system is broken. If it's a hardware problem, installing a linux distro won't help. If it's not, installing any OS from scratch (including Yosemite) will fix it.

[prapam2]

Yosemite feels slower. I rarely encountered the loading spinner, after upgrade i see every day more then once. Its very frustrating to work.