I haven't experimented with CC_MD5, but we do have code which calculates MD5s (calculated via simple C code). Is CC_MD5 optimized e.g. using SSE or AltiVec? Should I expect to see a perf boost if I swapped in this code instead of our regular C code?

Jean-Daniel Dupas wrote:

Le 2 avr. 08 à 01:36, stephen joseph butler a écrit :
On Tue, Apr 1, 2008 at 6:20 PM, Martin Redington <[EMAIL PROTECTED]>
wrote:

I'm running /sbin/md5 via an NSTask on a number of files (3,000 or
so, with a new NSTask each time).


This would run a lot faster (and avoid fd issues) if you used libcrypto. Try
"man EVP_DigestInit" to get an idea of where to start.


And this would not require libcrypto dependency if you use CommonDigest that is part of the Mac OS X libSystem. (usr/include/CommonCrypto/CommonDigest.h) and that is not more complexe than EVP:

extern unsigned char *CC_MD5(const void *data, CC_LONG len, unsigned char *md);


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