See comments #2, 5, 6, and 14 on bug 230491. > The built-in caching doesn't seem useful for this case. Enabling it results in a test run creating this unfortunate entry in top: > > 63957 root 9 52 0 24000K 4696K uwait 19 9:15 268.91% nscd > > and actually *slows down* stat(1) in my tests - /usr/src goes from 22 seconds to almost 90, and my CVS repository scan goes from 55 seconds to 2 minutes. > Reducing thread count improves performance with nscd, but at "threads 1" it's still 52s vs 22s uncached.