# Revision history [back]

### max_step_size, real_time_factor and real_time_update_rate

I'm confused why you can specify all three of them in the world file. As far as I understand they are linearly dependent.

real_time_factor = max_step_size * real_time_update_rate

so if i set real_time_update_rate = 0 (to make gazebo run as fast as possible, what should i set real_time_factor to?