I'd be happy to incorporate those changes in the next version. Re. fast SHA1 assembler tricks with MMX etc, if I recall there are some people who have researched this and made some progress. I think some of their source is available (some not). You could have a look for that. Adam Jonathan Morton wrote: > I recently sent Adam an updated version of libsha1.c, which is about > 20% faster on x86 machines. After some more thought in this vein, I'd > like to help write a set of "fast minting" routines which maximise > sustained minting performance on a given class of machines.