Mailinglist Archive: opensuse (929 mails)

[Roger Oberholtzer <roger@xxxxxx>]

I am looking at libjpeg on openSUSE 11.4. There is a variation of the
good old libjpeg which is called libjpeg-turbo. It enables some intel
processor instructions to supposedly speed up encoding and decoding byu
a factor of 2x - 4x.

I see that I have libjpeg-turbo installed. The odd thing is that the RPM
does not actually contain a libjpeg. It is only the wrapper programs
like cjpeg. These programs just seem to use the
regular /usr/lib/libjpeg.so.62 that comes with the usual libjpeg rpm.

So, what is libjpeg-turbo really installing? Surely the turbo
improvements must be in the library itself. If the standard
libjpeg.so.62 is compiled with these extensions, what could a turbo
cjpeg add?

As usual, I'm confused.


-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

SHAW'S PRINCIPAL
    Build a system that even a fool can use,
    and only a fool will want to use it.

-- 
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx