Re: [NSPipe pipe] returning nil (running out of filehandles?)
Re: [NSPipe pipe] returning nil (running out of filehandles?)
- Subject: Re: [NSPipe pipe] returning nil (running out of filehandles?)
- From: John Stiles <email@hidden>
- Date: Tue, 01 Apr 2008 16:55:21 -0700
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@hidden>
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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