On Tue, May 8, 2012 at 1:10 PM, Roberto Ragusa mail@robertoragusa.it wrote:
On 05/08/2012 09:40 PM, T.C. Hollingsworth wrote:
On Tue, May 8, 2012 at 8:47 AM, Roberto Ragusa mail@robertoragusa.it wrote:
An additional test, on the F16 machine:
- "kate" is normally fast
- "ssh -Y localhost kate" is slooooooooooooooooooow
What is happening here????
Is `ssh -Y localhost kate -graphicssystem native` faster?
Absolutely yes! The speed is normal again.
I also tried "-graphicssystem raster" which is sloooow, and "-graphicssystem opengl" which is bugged (pieces of the GUI are missing).
Why is the default so bad for ssh?
The default is the "raster" graphics engine, which works somewhat like you described in your original e-mail: http://labs.qt.nokia.com/2009/12/18/qt-graphics-and-performance-the-raster-e...
The "native" graphics engine uses regular X11, which will probably always be best over SSH.
Qt also respects the QT_GRAPHICSSYSTEM environment variable to configure this, so you can add `export QT_GRAPHICSSYSTEM=native` to your ~/.profile or wherever to make it your "default".
-T.C.