Re: git commit results in many lstat()s

"Gumbel, Matthew K" [off-list ref] writes:

"Junio C Hamano" [off-list ref] writes:

quoted

There probably are other things that can be optimized.

Yes, I think that when the user passes --only flag to git-commit, then git does not
need to call refresh_cache() in prepare_index() in builtin/commit.c.

I may experiment with that. Do you see any downside or negative side-effects?

There may be other fallouts, but one that immediately comes to mind
is that it may break pre-commit hook.

When we get "--only", we prepare an temporary index to create the
commit out of, and give it to the pre-commit hook.  The hook expects
that the cached stat information is up-to-date, iow, it does not
have to do 'update-index --refresh' before using plumbing commands
like "diff-index" to do its own inspection of the working tree.