Hi Reinhard, On Di 24 Jan 2012 09:26:57 CET Reinhard Tartler wrote:
On Di, Jan 24, 2012 at 00:15:26 (CET), Mike Gabriel wrote:Hi once again, On Mo 23 Jan 2012 20:37:18 CET Mike Gabriel wrote:Hi again, On Mo 23 Jan 2012 18:57:37 CET Mike Gabriel wrote: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 Regardslibjpeg-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.Here is a recipe how to test NX with libjpeg-turbo: ON SERVER --------- 1. Install libjpeg-turbo from X2Go heuler repository (Debian-only)Won't that step replace the 'normal' system libjpeg? Are you sure that this step won't break existing applications? These bug threads make me a bit nervous: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612341 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=602034
I am not even sure if you can replace the libs on-the-fly (i.e. without rebuilding NX). The libjpeg-turbo source package does not provide a -dev package. It uses libjpeg-dev as installed with libjpeg62-dev. Not sure if this is a mistake by Fabo (the guy you prepared the package for Debian).
Only thing I can report is a change in speed and no obvious problems with other apps.
There also has been developed a mature 8.0 emulation mode that still has to be enable in the package. I may take a look at that later.
But basically, I think: yes, if the user installs libjpeg-turbo it will have an effect on all applications.
Greets, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: [email protected], http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb
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