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It's slow in my machine. A Slackware 13.1 box with a Core i5 650 3.2 GHz. It's only 500 MB/s, where OpenSSL MD5 is 600 MB/s. The reason is the (broken) optimizer of gcc 4.4.4 that does things like: g++ -g -c -O2 MurmurHash3.cpp -o MurmurHash3.o -> .cpp k1 *= c1; -> .asm 152: 8d 14 80 lea (%eax,%eax,4),%edx 155: 8d 14 90 lea (%eax,%edx,4),%edx 158: c1 e2 03 shl $0x3,%edx 15b: 29 c2 sub %eax,%edx 15d: 8d 14 d2 lea (%edx,%edx,8),%edx 160: 8d 14 90 lea (%eax,%edx,4),%edx 163: 8d 14 d0 lea (%eax,%edx,8),%edx 166: 8d 14 90 lea (%eax,%edx,4),%edx 169: 8d 14 50 lea (%eax,%edx,2),%edx 16c: 8d 14 90 lea (%eax,%edx,4),%edx 16f: 8d 14 92 lea (%edx,%edx,4),%edx 172: 8d 14 50 lea (%eax,%edx,2),%edx 175: 8d 04 d0 lea (%eax,%edx,8),%eax 178: 8d 14 c5 00 00 00 00 lea 0x0(,%eax,8),%edx 17f: 29 d0 sub %edx,%eax changing the c1,c2,c3,c4 constants as global variables, fixes that, and I get 3000 MB/s.
Original issue reported on code.google.com by amadva...@gmail.com on 12 Apr 2011 at 6:31
amadva...@gmail.com
The text was updated successfully, but these errors were encountered:
Original comment by tanj...@gmail.com on 11 May 2012 at 5:40
tanj...@gmail.com
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Original issue reported on code.google.com by
amadva...@gmail.com
on 12 Apr 2011 at 6:31The text was updated successfully, but these errors were encountered: