[magick-developers] ImageMagick 6.3.5 compile flags big performance drop

[Henrik Zagerholm]

12 jul 2007 kl. 17:26 skrev ademmler:

> Hi Henrik!
>
> It coud be that you compare a 8bit and a 16bit Version from  
> ImageMagick.
>
> type on the shell:
> identify -version
> Version: ImageMagick 6.2.8 11/16/06 Q8 http://www.imagemagick.org
> Copyright: Copyright (C) 1999-2006 ImageMagick Studio LLC
>
> Q8 = 8bit and Q16=16bit Version
You are correct. It is Q16 version. I'll recompile and test again!  
Thanks!
//Henrik

>
> I recomend compiling IM from the sources and use this option while  
> configure: --with-quantum-depth=8
> This improves speed drastically and I think 8bit depth is enough  
> for daily work . . .
>
> Alex
>
> Am 12.07.2007 um 15:27 schrieb Henrik Zagerholm:
>
>> Hello list,
>>
>> Im running debian and until recently I used their ImageMagick  
>> package with version 6.2.4.
>>
>> Using this package I converted a 8 MB psd file to png in 3 seconds.
>>
>> Now I downloaded and compiled the latest source 6.3.5 code.
>>
>> Using the same convert command on the same file takes 17 seconds(!)
>>
>> Has anyone the slightest idea what could be wrong and what  
>> configure flags that could have this much impact.
>>
>> The systems is a Intel P4 2.8GHz, with 1GB ram running debian etch.
>>
>> Thanks,
>> Henrik
>>
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>