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Re: MathLink performance

• To: mathgroup at smc.vnet.net
• Subject: [mg20237] Re: MathLink performance
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Fri, 8 Oct 1999 18:30:15 -0400
• Organization: Universitaet Leipzig
• References: <7tgs01$smo@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

this is strange and I assume a bug in your C code. I have several
MathLink programs for images and I can tell you that this effect 
has nothing to do with Mathematica or MathLink. Can you send me
the C-source ? I will have a look on it to see whats wrong.

Regards
  Jens


"Roberto Abraham at IoA, Cambridge" wrote:
> 
> Hi -- I'm trying to improve the performance of my MathLink C code (which
> reads an image file into Mathematica). I've noticed that the first time I
> call my external function to access my image data it runs much more
> quickly than when I call it subsequently (by about a factor of 10). Does
> anyone have an explanation for this behaviour? I've tried contacting WRI
> technical support about this issue but have not really gotten an answer.
> 
> Regards,
> 
> Bob Abraham