SourceTree very slow when switching repository tabs

My SourceTree GIT manager was freezing for 5-10 seconds when switching between repositories.

These commands fixed the issue:

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

Also in combination with adding GIT program folder and SourceTree program folder to excluded paths for Windows Defender (antivirus scanner). The switch between tabs is now instant.

Source: SourceTree very slow with many repositories