> * Slow as hell
Good to know I'm not the only one with this issue.
There are a few Git specific things if you're running Git < v2 that you can try: https://stackoverflow.com/questions/4485059/git-bash-is-extr...
And in Sourcetree, set options under Options -> Diff, set Size Limit (Text) to 128KB and Size Limit (Binary) to 1024KB.
> * Slow as hell
Good to know I'm not the only one with this issue.