Bruce Evans fdd71f982f Don't synchronously update the directory entry at the end of every
successful write.  Only do it for the IO_SYNC case (like ufs).  On
one of my systems, this speeds up `iozone 24 512' from 32K/sec
(1/128 as fast as ufs) to 2.8MB/sec (7/10 as fast as ufs).

Obtained from:	partly from NetBSD
1996-12-25 20:15:12 +00:00
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