[Lazarus] Using libjpeg

[Sandro Cumerlato]

Hello Ara, my tests with libjpeg-*turbo* are even more promising.

The following comparison between LCL and libjpeg-*turbo* was made
decompressing for about one minute a sequence of several 4000x3000 JPEG
pictures. The results are expressed in "pictures per second" and prove that
libjpeg-*turbo* is about 7-8 times faster than LCL:
AMD E2-1800 1.70 GHz
*Turbo i386-win32*
LCLlibjpeg-turboRatio
0.32 2.46 7.69x
*Turbo x86_64-win64*
LCLlibjpeg-turboRatio
0.36 2.72 7.56xIntel Pentium N3520 2.16 GHz
*Turbo i386-win32*
LCLlibjpeg-turboRatio
0.41 3.06 7.46x
*Turbo x86_64-win64*
LCLlibjpeg-turboRatio
0.43 3.35 7.79xIntel Core i5-4300 2.50 GHz
*Turbo i386-win32*
LCLlibjpeg-turboRatio
1.01 8.41 8.33x
*Turbo x86_64-win64*
LCLlibjpeg-turboRatio
1.10 9.18 8.35x

Best regards,
Sandro Cumerlato



On 31 March 2016 at 12:12, Aradeonas <aradeonas at operamail.com> wrote:

> Thanks but I need libjpeg using because of speed and fpimage
> with UsePalette := False is not fast enough.
> My tests with libjpeg.dll and this header
> <http://www.dev-center.de/header/libjpeg?cat=header&file=libjpeg> id much
> faster than fpimage (half the time) so I wanted to have a native way using
> pasjpeg instead of a dll.
>
> Regards,
> Ara
>
>
>
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