SourceTree very slow with many repositories

Question

I know this is an old question, but you could also try this:

https://stackoverflow.com/a/24045966/371917

$ git config --global core.preloadindex true
$ git config --global core.fscache true
$ git config --global gc.auto 256

Secondly, here is a post that explains that git gc --aggressive may not be a great idea.

Executing the stated git command did not do the trick for me. Eventually what really speed up SourceTree was disabling 'spell check commit messages' in the tools > options menu. I also disabled 'load avatar images from gravatar.com' option while I was at it.

Any action in my source tree was super slow. Commit, click on a file to see changes, push etc.

I discovered that my antivirus (avast) was the cause. I disabled the file protection and source tree became immediate.

I had this problem too. I also have avast and this worked for me and might work for you and maybe a different AV. But I added the C:\Users\YOURNAME\AppData\Local\Atlassian\ to my avast exclusions directory and now it is running much faster!

For me it was the 'spell check commit messages' option in the settings. Even clicking the tick took 20 sec to process, but it was the last freezing I experienced.