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Re: Re: Huge memory consumption of GIF.exe

  • To: mathgroup at smc.vnet.net
  • Subject: [mg97132] Re: [mg97090] Re: Huge memory consumption of GIF.exe
  • From: John Fultz <jfultz at wolfram.com>
  • Date: Fri, 6 Mar 2009 04:23:59 -0500 (EST)
  • Reply-to: jfultz at wolfram.com

It is, in fact, a part of Mathematica.  It's an external MathLink program (the 
same kind you would generally launch with Install[]) which can very quickly
convert between Mathematica's internal raster format and the GIF format. It sits 
behind the implementation of Import/Export for GIF.  There are similar binaries 
for some of other formats we support, and not just for image formats.

I can't comment on this specific issue (development well out of my area) except 
to say I've made sure to kick it to the right people for internal investigation.

Sincerely,
 
John Fultz
jfultz at wolfram.com
User Interface Group
Wolfram Research, Inc.


On Thu, 5 Mar 2009 04:53:32 -0500 (EST), dh wrote:
>
>
> Hi,
>
> what is GIF.exe?
>
> Anyway, it seems to be an external program that has nothing to do with
>
> mathematica.
>
> Daniel
>
>
> andreas.kohlmajer at gmx.de wrote:
>
>> Hello!
>>
>>
>> I have difficulties with high memory consumption of GIF.exe. I need to
>>
>> statistically evaluate a few million SQL-recordsets (grouped by a few
>>
>> thousand batches). After calculating the data, I also create some
>>
>> little GIF-images as a visual aid. So far, I have generated approx.
>>
>> 2000 images using Export[..., "...GIF"] (average image size approx.
>>
>> 120 kB) and GIF.exe now consumes approx. 1 GB of RAM. The Mathematica
>>
>> code is a loop (using some Block constructs); all intermediate
>>
>> variables are cleared (using Clear[...]) at the end of the loop.
>>
>>
>> It seems, that GIF.exe does not deallocate the used memory. Is there
>>
>> any way to deallocate the memory used by GIF.exe? The Mathematica
>>
>> front end has crashed after 4 hours and I still need to evaluate a few
>>
>> hundred batches.
>>
>>
>> Thanks for any help!





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