Re: [PATCH v1 1/2] reset: don't compute unstaged changes after reset when --quiet

> I actually started my effort to speed up reset by attempting to
> multi-thread refresh_index().  You can see a work in progress at:
>
> https://github.com/benpeart/git/pull/new/refresh-index-multithread-gvfs
>
> The patch doesn't always work as it is still not thread safe.  When it
> works, it's great but I ran into to many difficulties trying to debug
> the remaining threading issues (even adding print statements would
> change the timing and the repro would disappear).  It will take a lot of
> code review to discover and fix the remaining non-thread safe code paths.
>
> In addition, the optimized code path that takes advantage of fsmonitor,
> uses multiple threads, fscache, etc _already exists_ in preload_index().
>   Trying to recreate all those optimizations in refresh_index() is (as I
> discovered) a daunting task.