Mid 2011 Macbook Pro
2,4 Ghz Intel Core i5
8 GB 1333 Mhz DDR3

OS X 10.9.2 (very fresh install)
Using system git 1.8.5.2
Repos on local SSD drive
4 bookmarks in SourceTree

Git status and git log are very fast, yet SourceTree is super slow to refresh changes, even when only one repo is open. I'm getting a lot of beach balls, even when trying to access the "About SourceTree" menu item.

I'm usually in the branch view (not Working Copy) and the list of changed files in the bottom left is the worst performer.

SourceTree is often using 120% CPU or even more, when doing stuff.

Alt-tabbing to SourceTree usually results in a slow refresh as well, blocking the entire app. When pressing the Commit button it usually takes a couple of seconds for the window to popup.

All my colleagues have the same problems, and it all started a couple of months ago. It's sadly come to the point where SourceTree is no longer usable.