Slow application

I ported an application to Qt 4.2 under Linux, primarily using the porting tools and qt3support classes.
When the program is executed, X takes about 50% of processor time, but the application is rather responsive.
After some time it becomes very slow. Even simple mouse presses take some time. X consumes about 95% of CPU, even when the application does nothing. Other applications remain responsive...

Any ideas?

Try profiling your program and detect the potential bottle necks.

You might be leaking memory. Does your "free" command show extensive swap memory usage?

I finally pinpointed the problem, and it is entirely within our code. Somehow a QTimer has sneaked in months ago, causing a repaint every 100 milliseconds :crying:
Removing this, the application executes normally.

Thanks anyway.