Ed25519 signatures

gistfile1.txt

$ time icc -march=native -ipo -std=gnu99 -O3 -parallel sign.c -o sign.icc
icc -march=native -ipo -std=gnu99 -O3 -parallel sign.c -o sign.icc  9.94s user 0.22s system 99% cpu 10.203 total

$ time gcc -march=native -flto -O3 -fuse-linker-plugin -std=gnu99 -O3 sign.c -o sign.gcc
gcc -march=native -flto -O3 -fuse-linker-plugin -std=gnu99 -O3 sign.c -o   9.51s user 0.43s system 99% cpu 9.957 total

$ time clang -march=native -O3 -std=gnu99 -O3 sign.c -o sign.clang
clang -march=native -O3 -std=gnu99 -O3 sign.c -o sign.clang  2.64s user 0.04s system 99% cpu 2.674 total

$ ./sign.icc 4096
Clock frequency: 2.5gHz
Warming up (factor=4096)... ok
Benchmarking (factor=2048)
16 bytes, 2389010 cycles
64 bytes, 2386160 cycles
256 bytes, 2393120 cycles
1024 bytes, 2362.81 cycles/byte
8192 bytes, 325.84 cycles/byte

$ ./sign.gcc 4096
Clock frequency: 2.5gHz
Warming up (factor=4096)... ok
Benchmarking (factor=2048)
16 bytes, 2405765 cycles
64 bytes, 2541900 cycles
256 bytes, 2415870 cycles
1024 bytes, 2523.20 cycles/byte
8192 bytes, 340.35 cycles/byte

$ ./sign.clang 4096
Clock frequency: 2.5gHz
Warming up (factor=4096)... ok
Benchmarking (factor=2048)
16 bytes, 1978820 cycles
64 bytes, 1980130 cycles
256 bytes, 1988450 cycles
1024 bytes, 1974.83 cycles/byte
8192 bytes, 285.26 cycles/byte