After adding a large number of files, Sourcetree will remain no responding for a long time when i choose this submission.

However, when the files were loaded completely, SourceTree seems goes well. But next time i choose that submission, this problem comes again. So I tried to use GitHub Desktop to show that submission history, and this problem didn't happen in that app.

It seems there are some bad logic of loading files in your code. If you have some plan to fix that?