On 2010-08-17 18:29, Alan Cox wrote: > Try it again on a memory resident file with the MAP_PREFAULT_READ option > that is provided by this patch: > > http://www.cs.rice.edu/~alc/MAP_PREFAULT_READ.patch
A time trial gives: grep with normal mmap() 1396s grep with prefault mmap() 1354s grep with regular read() 1354s So normal mmap is ~3% slower, and prefault mmap does not seem to make any measurable difference. I guess the added complexity is not really worth it, for now. _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
