| Time | Relative time | Primitive | Implementation | Compiler |
|---|
| 17872 | 1.00 | aes128ctr | crypto_stream/aes128ctr/cryptopp | g++ -m64 -march=native -mtune=native -O3 -fomit-frame-pointer (4.4.3) |
| 14532 | 1.00 | aes128estream | crypto_stream/aes128estream/e/schwabe/core2 | gcc -funroll-loops -m64 -O2 -fomit-frame-pointer |
| 15278 | 1.05 | aes128estream | crypto_stream/aes128estream/e/schwabe/athlon64-1 | gcc -m64 -march=k8 -O3 -fomit-frame-pointer |
| 15425 | 1.06 | aes128estream | crypto_stream/aes128estream/e/schwabe/athlon64-2 | gcc -m64 -O3 -fomit-frame-pointer |
| 16371 | 1.13 | aes128estream | crypto_stream/aes128estream/e/hongjun/v1 | gcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer |
| 16757 | 1.15 | aes128estream | crypto_stream/aes128estream/e/hongjun/v0 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 18986 | 1.31 | aes128estream | crypto_stream/aes128estream/e/bernstein/amd64-1 | gcc -m64 -march=core2 -O3 -fomit-frame-pointer |
| 19001 | 1.31 | aes128estream | crypto_stream/aes128estream/e/bernstein/amd64-2 | gcc -m64 -O3 -fomit-frame-pointer |
| 20451 | 1.41 | aes128estream | crypto_stream/aes128estream/e/bernstein/little-2 | gcc -m64 -march=nocona -O3 -fomit-frame-pointer |
| 20548 | 1.41 | aes128estream | crypto_stream/aes128estream/e/gladman | gcc -funroll-loops -m64 -march=nocona -Os -fomit-frame-pointer |
| 21270 | 1.46 | aes128estream | crypto_stream/aes128estream/e/bernstein/little-1 | gcc -march=nocona -O2 -fomit-frame-pointer |
| 22661 | 1.56 | aes128estream | crypto_stream/aes128estream/e/bernstein/little-4 | gcc -march=barcelona -O2 -fomit-frame-pointer |
| 23432 | 1.61 | aes128estream | crypto_stream/aes128estream/e/bernstein/little-3 | gcc -funroll-loops -m64 -march=barcelona -O2 -fomit-frame-pointer |
| 23797 | 1.64 | aes128estream | crypto_stream/aes128estream/e/bernstein/big-1 | gcc -funroll-loops -O -fomit-frame-pointer |
| 21700 | 1.00 | aes192ctr | crypto_stream/aes192ctr/cryptopp | g++ -m64 -march=barcelona -O3 -fomit-frame-pointer (4.4.3) |
| 25282 | 1.00 | aes256ctr | crypto_stream/aes256ctr/cryptopp | g++ -march=k8 -O3 -fomit-frame-pointer (4.4.3) |
| | aes256ctr | crypto_stream/aes256ctr/dolbeau/aesenc-int | gcc -m64 -O3 -fomit-frame-pointer |
| | aes256ctr | crypto_stream/aes256ctr/openssl | gcc -m64 -O3 -fomit-frame-pointer |
| 23217 | 1.00 | aes256estream | crypto_stream/aes256estream/e/hongjun/v1 | gcc -march=nocona -O2 -fomit-frame-pointer (4.4.3) |
| 23534 | 1.01 | aes256estream | crypto_stream/aes256estream/e/hongjun/v0 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 27067 | 1.17 | aes256estream | crypto_stream/aes256estream/e/gladman | gcc -funroll-loops -march=nocona -Os -fomit-frame-pointer |
| 67054 | 1.00 | amastrid | crypto_stream/amastrid/ref (1.1.0) | g++ -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer (4.4.3) |
| 2315 | 1.00 | chacha12 | crypto_stream/chacha12/moon/ssse3/64 | gcc -march=k8 -O3 -fomit-frame-pointer (4.4.3) |
| 2641 | 1.14 | chacha12 | crypto_stream/chacha12/moon/sse2/64 | gcc -funroll-loops -fno-schedule-insns -Os -fomit-frame-pointer |
| 2958 | 1.28 | chacha12 | crypto_stream/chacha12/krovetz/vec128 | gcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer |
| 3219 | 1.39 | chacha12 | crypto_stream/chacha12/e/amd64-xmm6 | gcc -O2 -fomit-frame-pointer |
| 6117 | 2.64 | chacha12 | crypto_stream/chacha12/e/amd64-3 | gcc -funroll-loops -march=barcelona -Os -fomit-frame-pointer |
| 6279 | 2.71 | chacha12 | crypto_stream/chacha12/e/regs | gcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer |
| 6769 | 2.92 | chacha12 | crypto_stream/chacha12/e/merged | gcc -funroll-loops -march=nocona -O -fomit-frame-pointer |
| 7497 | 3.24 | chacha12 | crypto_stream/chacha12/e/ref | gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/amd64-ssse3 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/goll_gueron | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/krovetz/avx2 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/armv6/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/avx/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/avx/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/avx2/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/avx2/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/neon/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/xop/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha12 | crypto_stream/chacha12/moon/xop/64 | gcc -m64 -O3 -fomit-frame-pointer |
| 3533 | 1.00 | chacha20 | crypto_stream/chacha20/moon/ssse3/64 | gcc -m64 -march=nocona -Os -fomit-frame-pointer (4.4.3) |
| 4140 | 1.17 | chacha20 | crypto_stream/chacha20/moon/sse2/64 | gcc -O2 -fomit-frame-pointer |
| 4228 | 1.20 | chacha20 | crypto_stream/chacha20/dolbeau/amd64-avx2 | gcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer |
| 4822 | 1.36 | chacha20 | crypto_stream/chacha20/krovetz/vec128 | gcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer |
| 4913 | 1.39 | chacha20 | crypto_stream/chacha20/e/amd64-xmm6 | gcc -m64 -O3 -fomit-frame-pointer |
| 9673 | 2.74 | chacha20 | crypto_stream/chacha20/e/amd64-3 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 10412 | 2.95 | chacha20 | crypto_stream/chacha20/e/regs | gcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer |
| 10783 | 3.05 | chacha20 | crypto_stream/chacha20/e/merged | gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer |
| 11280 | 3.19 | chacha20 | crypto_stream/chacha20/e/ref | gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/amd64-ssse3 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/dolbeau/arm-neon | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/goll_gueron | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/krovetz/avx2 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/armv6/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/avx/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/avx/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/avx2/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/avx2/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/neon/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/xop/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha20 | crypto_stream/chacha20/moon/xop/64 | gcc -m64 -O3 -fomit-frame-pointer |
| 1678 | 1.00 | chacha8 | crypto_stream/chacha8/moon/ssse3/64 | gcc -O3 -fomit-frame-pointer (4.4.3) |
| 1901 | 1.13 | chacha8 | crypto_stream/chacha8/moon/sse2/64 | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer |
| 2009 | 1.20 | chacha8 | crypto_stream/chacha8/krovetz/vec128 | gcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer |
| 2351 | 1.40 | chacha8 | crypto_stream/chacha8/e/amd64-xmm6 | gcc -fno-schedule-insns -O3 -fomit-frame-pointer |
| 4326 | 2.58 | chacha8 | crypto_stream/chacha8/e/amd64-3 | gcc -m64 -march=nocona -Os -fomit-frame-pointer |
| 4899 | 2.92 | chacha8 | crypto_stream/chacha8/e/regs | gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer |
| 4922 | 2.93 | chacha8 | crypto_stream/chacha8/e/merged | gcc -funroll-loops -march=nocona -O -fomit-frame-pointer |
| 5559 | 3.31 | chacha8 | crypto_stream/chacha8/e/ref | gcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/amd64-ssse3 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/goll_gueron | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/krovetz/avx2 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/armv6/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/avx/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/avx/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/avx2/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/avx2/64 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/neon/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/xop/32 | gcc -m64 -O3 -fomit-frame-pointer |
| | chacha8 | crypto_stream/chacha8/moon/xop/64 | gcc -m64 -O3 -fomit-frame-pointer |
| 5533 | 1.00 | cryptmtv3 | crypto_stream/cryptmtv3/e/v3 | gcc -funroll-loops -m64 -march=nocona -O -fomit-frame-pointer (4.4.3) |
| | dragon | crypto_stream/dragon/e/submissions/dragon | gcc -m64 -O3 -fomit-frame-pointer |
| 19000 | 1.00 | hc128 | crypto_stream/hc128/e/hc-128/200701a | gcc -m64 -march=nocona -O3 -fomit-frame-pointer (4.4.3) |
| 19136 | 1.01 | hc128 | crypto_stream/hc128/e/hc-128/200606 | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer |
| 19136 | 1.01 | hc128 | crypto_stream/hc128/e/hc-128/200701b | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer |
| 45311 | 1.00 | hc256 | crypto_stream/hc256/e/hc-256/200701 | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer (4.4.3) |
| 45336 | 1.00 | hc256 | crypto_stream/hc256/e/hc-256/200511 | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer (4.4.3) |
| 8302 | 1.00 | lexv2 | crypto_stream/lexv2/e/v2/ref | gcc -funroll-loops -march=barcelona -O3 -fomit-frame-pointer (4.4.3) |
| 8338 | 1.00 | lexv2 | crypto_stream/lexv2/e/v2/schwabe/amd64-1 | gcc -m64 -march=nocona -O3 -fomit-frame-pointer |
| 8409 | 1.01 | lexv2 | crypto_stream/lexv2/e/v2/schwabe/amd64-2 | gcc -funroll-loops -m64 -march=barcelona -O -fomit-frame-pointer |
| 6165 | 1.00 | nlsv2 | crypto_stream/nlsv2/e/v2/sync/2 | gcc -m64 -march=core2 -O3 -fomit-frame-pointer (4.4.3) |
| 12455 | 2.02 | nlsv2 | crypto_stream/nlsv2/e/v2/sync/1 | gcc -m64 -march=k8 -O3 -fomit-frame-pointer |
| 33331 | 1.00 | ocelot1 | crypto_stream/ocelot1/ref (2.1.0) | g++ -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer (4.4.3) |
| | ocelot2 | crypto_stream/ocelot2/ref | g++ -m64 -O3 -fomit-frame-pointer |
| 5814 | 1.00 | panama | crypto_stream/panama/cryptopp | g++ -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer (4.4.3) |
| 6860 | 1.00 | rabbit | crypto_stream/rabbit/e/opt/2/3 | gcc -funroll-loops -march=nocona -O -fomit-frame-pointer (4.4.3) |
| 6865 | 1.00 | rabbit | crypto_stream/rabbit/e/opt/2/2 | gcc -funroll-loops -m64 -O -fomit-frame-pointer |
| 6882 | 1.00 | rabbit | crypto_stream/rabbit/e/opt/1/4 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 6885 | 1.00 | rabbit | crypto_stream/rabbit/e/opt/1/2 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 6885 | 1.00 | rabbit | crypto_stream/rabbit/e/opt/1/3 | gcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer |
| 8395 | 1.22 | rabbit | crypto_stream/rabbit/e/ref | gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer |
| 10217 | 1.49 | rabbit | crypto_stream/rabbit/e/opt/1/1 | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer |
| 10237 | 1.49 | rabbit | crypto_stream/rabbit/e/opt/2/1 | gcc -funroll-loops -m64 -Os -fomit-frame-pointer |
| | rabbit | crypto_stream/rabbit/e/opt/2/4 | gcc -m64 -O3 -fomit-frame-pointer |
| | rabbit | crypto_stream/rabbit/e/opt/2/5 | gcc -m64 -O3 -fomit-frame-pointer |
| | rijn256ctr | crypto_stream/rijn256ctr/gil | gcc -m64 -O3 -fomit-frame-pointer |
| 4922 | 1.00 | salsa20 | crypto_stream/salsa20/e/amd64-xmm6 | gcc -march=barcelona -O3 -fomit-frame-pointer (4.4.3) |
| 4947 | 1.01 | salsa20 | crypto_stream/salsa20/amd64_xmm6 | gcc -m64 -O -fomit-frame-pointer |
| 5488 | 1.11 | salsa20 | crypto_stream/salsa20/dolbeau/amd64-xmm6int | gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer |
| 5777 | 1.17 | salsa20 | crypto_stream/salsa20/e/amd64-xmm5 | gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer |
| 8395 | 1.71 | salsa20 | crypto_stream/salsa20/e/amd64-xmm | gcc -m64 -march=barcelona -O -fomit-frame-pointer |
| 8684 | 1.76 | salsa20 | crypto_stream/salsa20/e/amd64-xmm2 | gcc -march=k8 -O3 -fomit-frame-pointer |
| 9679 | 1.97 | salsa20 | crypto_stream/salsa20/e/amd64-3 | gcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer |
| 10115 | 2.06 | salsa20 | crypto_stream/salsa20/e/amd64-2 | gcc -funroll-loops -fno-schedule-insns -O -fomit-frame-pointer |
| 10965 | 2.23 | salsa20 | crypto_stream/salsa20/e/merged | gcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer |
| 11076 | 2.25 | salsa20 | crypto_stream/salsa20/e/regs | gcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer |
| 11478 | 2.33 | salsa20 | crypto_stream/salsa20/e/ref | gcc -m64 -march=barcelona -O3 -fomit-frame-pointer |
| 13280 | 2.70 | salsa20 | crypto_stream/salsa20/ref | gcc -march=k8 -O3 -fomit-frame-pointer |
| 14235 | 2.89 | salsa20 | crypto_stream/salsa20/e/amd64-1 | gcc -m64 -O3 -fomit-frame-pointer |
| 3196 | 1.00 | salsa2012 | crypto_stream/salsa2012/e/amd64-xmm6 | gcc -fno-schedule-insns -O2 -fomit-frame-pointer (4.4.3) |
| 3199 | 1.00 | salsa2012 | crypto_stream/salsa2012/amd64_xmm6 | gcc -m64 -O -fomit-frame-pointer |
| 3754 | 1.17 | salsa2012 | crypto_stream/salsa2012/e/amd64-xmm5 | gcc -funroll-loops -march=barcelona -O2 -fomit-frame-pointer |
| 5321 | 1.66 | salsa2012 | crypto_stream/salsa2012/e/amd64-xmm | gcc -m64 -march=barcelona -O2 -fomit-frame-pointer |
| 5437 | 1.70 | salsa2012 | crypto_stream/salsa2012/e/amd64-xmm2 | gcc -m64 -O3 -fomit-frame-pointer |
| 6055 | 1.89 | salsa2012 | crypto_stream/salsa2012/e/amd64-3 | gcc -m64 -march=core2 -O -fomit-frame-pointer |
| 6378 | 2.00 | salsa2012 | crypto_stream/salsa2012/e/amd64-2 | gcc -m64 -march=core2 -msse4 -Os -fomit-frame-pointer |
| 6548 | 2.05 | salsa2012 | crypto_stream/salsa2012/e/regs | gcc -m64 -O3 -fomit-frame-pointer |
| 6653 | 2.08 | salsa2012 | crypto_stream/salsa2012/e/merged | gcc -march=nocona -O3 -fomit-frame-pointer |
| 7180 | 2.25 | salsa2012 | crypto_stream/salsa2012/e/ref | gcc -O3 -fomit-frame-pointer |
| 8911 | 2.79 | salsa2012 | crypto_stream/salsa2012/e/amd64-1 | gcc -m64 -O2 -fomit-frame-pointer |
| 9107 | 2.85 | salsa2012 | crypto_stream/salsa2012/ref | gcc -m64 -march=barcelona -O3 -fomit-frame-pointer |
| 2332 | 1.00 | salsa208 | crypto_stream/salsa208/amd64_xmm6 | gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer (4.4.3) |
| 2354 | 1.01 | salsa208 | crypto_stream/salsa208/e/amd64-xmm6 | gcc -march=nocona -O2 -fomit-frame-pointer |
| 2734 | 1.17 | salsa208 | crypto_stream/salsa208/e/amd64-xmm5 | gcc -m64 -march=core2 -O2 -fomit-frame-pointer |
| 3723 | 1.60 | salsa208 | crypto_stream/salsa208/e/amd64-xmm | gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer |
| 3865 | 1.66 | salsa208 | crypto_stream/salsa208/e/amd64-xmm2 | gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer |
| 4341 | 1.86 | salsa208 | crypto_stream/salsa208/e/amd64-3 | gcc -funroll-loops -m64 -Os -fomit-frame-pointer |
| 4519 | 1.94 | salsa208 | crypto_stream/salsa208/e/amd64-2 | gcc |
| 4635 | 1.99 | salsa208 | crypto_stream/salsa208/e/regs | gcc -m64 -O3 -fomit-frame-pointer |
| 4893 | 2.10 | salsa208 | crypto_stream/salsa208/e/merged | gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer |
| 5579 | 2.39 | salsa208 | crypto_stream/salsa208/e/ref | gcc -march=barcelona -O3 -fomit-frame-pointer |
| 6267 | 2.69 | salsa208 | crypto_stream/salsa208/e/amd64-1 | gcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer |
| 7149 | 3.07 | salsa208 | crypto_stream/salsa208/ref | gcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer |
| 5751 | 1.00 | snow20 | crypto_stream/snow20/e/benchmarks/snow-2.0 | gcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer (4.4.3) |
| 5848 | 1.00 | sosemanuk | crypto_stream/sosemanuk/cryptopp | g++ -m64 -march=nocona -O3 -fomit-frame-pointer (4.4.3) |
| 6412 | 1.10 | sosemanuk | crypto_stream/sosemanuk/e/submissions/sosemanuk | gcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer |
| 8641 | 1.00 | tpy | crypto_stream/tpy/e/tpy | gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer (4.4.3) |
| 6165 | 1.00 | tpy6 | crypto_stream/tpy6/e/tpy6 | gcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer (4.4.3) |
| 10647 | 1.00 | tpypy | crypto_stream/tpypy/e/tpypy | gcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer (4.4.3) |
| 5366 | 1.00 | trivium | crypto_stream/trivium/e/submissions/trivium | gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer (4.4.3) |
| 5420 | 1.00 | xsalsa20 | crypto_stream/xsalsa20/ref | gcc -m64 -march=core2 -O -fomit-frame-pointer (4.4.3) |