There have been serious issues with performance in the 1.6 releases (including Windows). There are a few Git specific things if you're running Git < v2 that yo

There have been serious issues with performance in the 1.6 releases (including Windows). 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-extremely-slow-in-windows-7-x64/24045966#24045966 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.