[boost] boost::signals2 performance

I have made now a lot of tests with the new signals2 library. The only thing because I don't want to use it now, is because it is really slow... I have made now performance tests with the dummy_mutex which is included. I have found out the about 50% of the time that it takes to call 10000000 is inside in slot_call_iterator---->lock_next_callable function. Here the follwing lines takes the 50% of the executing time: lock_type lock(**iter); tracked_ptrs = (*iter)->nolock_grab_tracked_objects(); I hope that one has an idea how it can be made it faster... Best regards Hansjörg