[Qt-interest] Qt3 vs Qt4 performance on remote X11 display

[Dmitry Nezhevenko]

On Thu, Mar 19, 2009 at 01:22:59PM +0100, Arnold Krille wrote:
> On Thursday 19 March 2009 10:53:45 Dmitry Nezhevenko wrote:
> > I've tried to launch simple Qt4 application on remote X11 display. The
> > application performance is VERY bad. It takes ~4 seconds to just repaint
> > focused widget.
> > Qt3 performance is not so fast too however if I compare "qtconfig" tools
> > from both Qt3 and Qt4, Qt3 version works much faster. Qt3 performance is
> > almost same as "Tcl/Tk". Qt4 is unusable at all. Even M$ windows
> > applications works faster (using wine).
> > Any ideas? Maybe some workaround.
> 
> Are you talking X11-over-ssh when you say remote X display?

Yes. Over SSH with enabled X11 forwarding

> Because I found that both over ssh and over vnc (tunneled through ssh or 
> openvpn) all X apps are the same speed. Regardless of the Qt-version...

Not all. tcl/tk, Windows applications using wine and Java (using Swing)
are fast enough

-- 
WBR, Dmitry
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