Peter: I'm not quite sure what's going on. Can you please post sources that demonstrate this? It'll be hard for people to help you without more info. -benjamin > gcc-2.95.3 (-ggdb3 -pg) took about 30sec > (50% profile overhead, 5% _memcpy) > gcc-3.0 (Apr 20 cvs, same options) took about 4min > (15% profile overhead, 80% _memcpy)