On Wed, Jul 08, 2009 at 07:43:50PM -0700, Linus Torvalds wrote: > > On filesystems without d_type, we can look at the cache entry first. > Doing an lstat() can be expensive. > > Reported by Dmitry Potapov for Cygwin. I have tested it on Cygwin. The number of 'stat' for files is now 1, so it works fine :) I still have the same large number of 'stat' calls for directories, but I suspect that due to that due to some Cygwin specific. I will investigate that issue later when I have more time. Because the repositoty on which I did testing has too many directories (one directory per each 3.5 files) the effect was not as prominent as it would be otherwise. Yet, it is 24.9% decrease of the number of 'stat' or 14.8% descreased of the total number of syscalls. And my measurement shows 14% descrease of run-time. So, it appears that on Windows the run time almost directly proportional of the total number of syscalls... BTW, I believe that this patch should help MinGW too, because AFAIK MinGW does not have d_type either. Thanks, Dmitry -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html