qt4 and X11 remote display

[bnolsen]

This is all over linux based X11. The processing software must be run on linux to avoid the really bad windows network and IO performance.

FYI these are GIS and photogrammetry applications. It's also not just our software, but a partner who ported their qt3 GIS app over to qt4 (not sure if they're using qt3 support, we certainly aren't). Their customer who is complaining has 10G and is having bad problems. Note the biggest problems show up with drawing interactive vector graphics on imagery (these are layers of imagery, not just single images). When Qt4 first was released the formal qt support groups had more than a few threads about bad vector performance in general.

Could this related to everything in qt4 being double buffered and grossly excessive cross chat with the x server? Also because of these types of problems we dumped Qt and used fltk for our interactive apps. The speed of fltk is absolutely amazing but its still an unfinished toolkit.