Hi again,

On Mo 23 Jan 2012 18:57:37 CET Mike Gabriel wrote:

Hi Waldek,

cross-posting to x2go-dev ML as we should not SPAM the x2go-user list with such complex stuff ;-) Maybe you want to subscribe to x2go-dev?

On Sa 21 Jan 2012 12:59:46 CET Waldek wrote:

Hi,

Anybody try to configure for example ubutu to configure x2goserver to use libjpeg-tubro ( http://sourceforge.net/projects/libjpeg-turbo/ ) instead libjpeg ? I have read that for example OpenNX client for neatx or freenx server recommend to use this because libjpeg-turbo have speed improvement than standard libjpeg and it will be use full to reduce transfer for x2go session. I don't know how to configure (or is it possible?) x2goserver on ubutu to use libjpeg-turbo

Regards

libjpeg-turbo support (from my perspective) is a distribution issue. Libjpeg-turbo is pending for Debian sid inclusion:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612341

As we do not have plans to ship libjpeg-turbo within the X2Go repository currently, I guess we will have to wait for distro inclusion in Debian/Ubuntu.

With other distros that already have libjpeg8 (optionally) replaced by libjpeg-turbo, it should be possible to compile NX (redistributed) against the faster libary.

There also is another NX related project on git.ethersoft.ru that provides NX with libjpeg-turbo. However, that repos only builds NX for FreeNX.

I have just tested an NX build against libjpeg-turbo. The libjpeg-turbo libraries I obtained from here:
http://people.debian.org/~fabo/libjpeg-turbo_1.1.90+svn704-1/

The test system was a Debian squeeze (so backporting from some brand new SID package is possible).

When using 16m-jpeg-9 compression over a UMTS (HDSPA) uplink the difference between libjpeg and libjpeg-turbo is smashing!!! It becomes so much smoother...

From my perspective, we should start testing on nx-libs with libjpeg-turbo in the nightly repository in the very very very near future.

The change-over is easy: if libjpeg-turbo62 is installable in the build chroot, NX builds against that one. If it is not present, it builds against libjpeg62.

@Developers: please give feedback on the proposed step.

Greets,
Mike

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