The following reply was made to PR port-amd64/35535; it has been noted by GNATS.

From: Kimura Fuyuki <fuyuki@hadaly.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: lib/35535: memcpy() is very slow if not aligned
Date: Sat, 3 Feb 2007 19:29:17 +0900

 Sorry for misfiling...
 
 If you want further improvement, here's also an SSEd version which scales to 
 megs and preserves cached data.
 
 http://www.hadaly.org/fuyuki/bcopy-sse.patch
 
 plain:
 
 $ time ./memcpy_bench 1000000 10000 0 0
 dst:0x503000 src:0x5f8000 len:1000000
 ./memcpy_bench 1000000 10000 0 0  9.50s user 0.00s system 99% cpu 9.566 total
 
 patched:
 
 $ time ./memcpy_bench 1000000 10000 0 0
 dst:0x503000 src:0x5f8000 len:1000000
 ./memcpy_bench 1000000 10000 0 0  6.38s user 0.00s system 99% cpu 6.425 total
 
 xine's score:
 
 Benchmarking memcpy methods (smaller is better):
         libc memcpy() : 218605133
         linux kernel memcpy() : 308372235
         MMX optimized memcpy() : 312928386
         MMXEXT optimized memcpy() : 216660195
         SSE optimized memcpy() : 214245218