I have a big repository in a shared folder. I use git from within a VM on that folder. Everything works nice, but the repository is big and git\'s searching through all director
You can try enabling the preloadindex option, described in the git-config man page:
core.preloadindex
Enable parallel index preload for operations like git diff
This can speed up operations like git diff and git status especially on filesystems like NFS that have weak caching semantics and thus relatively high IO latencies. With this set to true, git will do the index comparison to the filesystem data in parallel, allowing overlapping IO's.
To turn this on use:
git config core.preloadindex true