mranostay@omap:~$ openssl speed sha256
Doing sha256 for 3s on 16 size blocks: 551986 sha256's in 3.00s
Doing sha256 for 3s on 64 size blocks: 356661 sha256's in 3.00s
Doing sha256 for 3s on 256 size blocks: 158764 sha256's in 3.00s
Doing sha256 for 3s on 1024 size blocks: 49539 sha256's in 3.00s
Doing sha256 for 3s on 8192 size blocks: 6676 sha256's in 2.99s
OpenSSL 1.0.0e 6 Sep 2011
built on: Wed Oct  5 01:45:02 UTC 2011
options:bn(64,32) rc4(ptr,char) des(idx,cisc,16,long) aes(partial) blowfish(ptr)
compiler: cc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -O2 -Wa,--noexecstack -g -Wall
The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
sha256            2943.93k     7608.77k    13547.86k    16909.31k    18290.90k