[hashcash] Re: cpu detection, disabling mmx code on non mmx cpu (Re: Re: status of hashcash version 1?)

  • From: Jean-Luc Cooke <jlcooke@xxxxxxxxxxxxxx>
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Thu, 5 Aug 2004 11:22:51 -0400

My my MD5 ASM libs are of any help, please use them (CVS instructions below).
I have X86 (ALU, MMX, SSE2 and interwoven mixes of the three), PPC (ALU,
AltiVec and interwoven), SPARC, Alpha.
  http://www.md5crk.com/?sec=howhelp

I have MD5 rates posted here:
  http://www.md5crk.com/?sec=speeds

Though I know hashcash doesn't use MD5 (good for you!) the ASM files may be
of some use to you.

Also, I wrote a JavaApplet/JavaScript implementation of Hashcash for use with
Web-Based email applications; removing the load of computing hashcash's to
the client.  The Pure JavaScript version is over 100 times slower than the
"JavaScript calling a method in the Java Applet" version.

What is the performance you're getting from ANSI-C sha1 libs?  I have a full
generic message digest algorithm library which computes 1.25 Million SHA-1
transforms per second (sample code below):

 { time_t start, end;
  sha1_init(&CTX);
  time(&start);
  for (i=0; i<10000000; i++)
    sha1_update(&CTX, 
"0123456701234567012345670123456701234567012345670123456701234567", 64);
  time(&end);
  sha1_final(D, &CTX);
  printf("delta = %lu\n", end-start);
 }

Other than providing code which you already have.  How can I help?

JLC

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