I use SourceTree daily and it regularly has very noticable lag on most window-related commands: close a window, open a repository, etc. And a lot of spinning beach-ball. Have you seen any of this?
I have experienced this. I think it happened when Atlassian switched over to WPF for the GUI in version 2 a few month backs. The new GUI has introduced a lot of bugs and performance issues that they still seem to be trying to figure out.
The visualization features are amazing though but could use a little bit more design.
