[LAD] [OT] need help from a Qt guru re: slow graphics

Rui Nuno Capela rncbc at rncbc.org
Sat May 26 14:47:22 UTC 2012

On 05/26/2012 03:40 PM, Dave Phillips wrote:
> On 05/26/2012 10:25 AM, Rui Nuno Capela wrote:
>> jfyi, there have been at least one case of slowness re. qtractor:
>> Qtractor graphics becomes very slow with many items
>> http://www.rncbc.org/drupal/node/441
>> what about switching QT_GRAPHICSSYSTEM=raster (env var) or start with
>> "-graphicssystem raster" command line option?
>> on my call and experience it (marginally) boosts rendering performance
>> somehow, but it scores some artifact side-effects, specially on
>> composite/opengl/eye-candy/sweetened WM's... as usual, ymmv ;)
> No sweetened WMs around here ! (It's xfce on the Arch box.)
> Well, Rui, I just knew that if anyone could solve my problem it'd be
> you. I added the CL option to the startup command, and voila, I have a
> fast Kdenlive again.
> Looks like I owe you a dram or two of single-malt. Again. ;)

slaintheva :)
rncbc aka Rui Nuno Capela
rncbc at rncbc.org

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