http://www.openwall.com/john/~/john-1.7/doc$ cat CHANGESThe following major changes have been made since John 1.6:* Bitslice Des Code for x86 with MMX: more than twice faster than oldernon-bitslice MMX code.* Bitsliced the LM hash code as well: now several times faster.* Significant improvements to the generic bitslice DES code: +20% on RISC.* PowerPC G4+ AltiVec support (Mac OS X and Linux):