This option was intended to track a problem that was fixed time ago. I left it for informational purposes. If performance sucks, try this from the bubblemon directory: ./configure --enable-profiling make clean ; make cd src ./bubblemon-gnome1 gprof -l -p ./bubblemon-gnome1 ~/gmon.out The output from the last command will tell you on what lines the program spends most of its time. To find out which functions take the most time, try: gprof -p ./bubblemon-gnome1 ~/gmon.out Happy profiling! //Johan