Re: [Lmuse-developer] getting my feet wet

[Robert J. <spa...@gm...>]

2010/10/27 Robert Jonsson <spa...@gm...>:
>
> Also, we seem to have some performance problems with signals, atleast
> I think that is the problem.
> I remember from a previous Qt4 project that the signals/slots
> mechanism in Qt4 is not as fast as in Qt3 (though much more flexible).
> We need to go through it and see if we can scale down on the signal
> usage for performance critical parts.

Possibly we can change a signal property for signals that are problematic.
It seems a define can be used to change the behaviour of signals.
http://doc.qt.nokia.com/4.3/qt.html#ConnectionType-enum

Setting the signal to specifically be Qt::DirectConnection that is.
Since we come from Qt3 we should already be doing all the gui work in
a single thread, which is what is needed here.

It's not really listed but it looks probable that the default is the
Qt::AutoConnection which, if it works, should already provide good
performance..

Regards,
Robert