Slow application

[Pieter from Belgium]

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?

[jpn]

Try profiling your program and detect the potential bottle necks.

[wysota]

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

[Pieter from Belgium]

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
Removing this, the application executes normally.

Thanks anyway.