On Wed, May 02, 2012 at 08:25:57PM +0200, Luigi Rizzo wrote: > as part of my netmap investigations, i was looking at how > expensive are memory copies, and here are a couple of findings > (first one is obvious, the second one less so)
Most C compilers (well, the ones I regularly use) inline small, constant-length memcpy operations of the sort you're describing here. I would expect techniques like that to beat any amount of hand-tuning in a elf-linkage bcopy subroutine. Sure, you want a good implementation for your variable-length copies, and data layout and alignment is tremendously important these days, so there's no single silver bullet here. Cheers, -- Andrew _______________________________________________ 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"