19 Fév
2009
19 Fév
'09
17:07
On 19-Feb-09, at 4:57 PM, Marc Feeley wrote:
On my 2GHz Mac Book Pro:
For MD5: 0.06 seconds per MB. For SHA-1: 0.13 seconds per MB.
That's still about 3 times slower than the "md5" utility on my machine, but still not too bad for bit-bashing code entirely written in Scheme.
By the way this slowdown is due to the 16-bit algorithms which are used to perform the computations without overflowing the fixnums. The C version probably does 32-bit operations, which is at least a factor of 2 faster, and probably more when shifts are involved.
Marc