No subject

comes to handling directories with tens of thousands of entries or
larger. Especially on cold-cache random lookups.

XFS also has quite sophisticated internal directory readahead, so
under the cold cache directory performance of XFS is far better than
ext3/4 can acheive, even for relatively small directories. IIRC this
difference in directory lookup performance was one of the prime
reasons kernel.org switched from ext3 to XFS a couple of years
back...

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com