Re: [GM-help] Problem with Graphics Magick ?

[Bob F. <bfr...@si...>]

On Mon, 2 May 2005, AUBINEAU Franck wrote:

> Hello,
>
> I need a graphic library to read/write/transform image so I'm trying 
> graphics magick ++ and the result (just read 1000 images) is :
>
> Tests de la librairie MAGICK GRAPHICS
> 1000 tests effectues
> Tests de decodage BMP :
> Temps : 6.187000 secondes
>
> In comparison, I made the same test with freeim and the result is :
>
> Tests de la librairie FREE IMAGE
> 1000 tests effectues
> Tests de decodage BMP :
> Temps : 0.922000 secondes
>
> Is it normal ??

I had not heard of "FREE IMAGE" before and Google is not helping any.

There is a bug (resource accounting leak) in GraphicsMagick 1.1.X 
releases prior to 1.1.6 (released yesterday) which causes image 
loading to become much slower after a large number of images have been 
read by one process.  If this is how you are using GraphicsMagick, 
then I definitely recommend testing with 1.1.6.

If "FREE IMAGE" uses 8-bits per sample but you are using 
a GraphicsMagick "Q:16" build (16-bits per color sample), then that 
would explain some of the performance difference.

Bob
======================================
Bob Friesenhahn
bfr...@si..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/