The Performance sensor provides information about how fast a simulation is being run and. Typically, you would use the Real-time factor output to know how fast a simulation is. For example,

A real-time factor of 1 means that the simulation runs real time. Running a 10-minute simulation will take 10 minutes
A real-time factor of 2 means that the simulation runs twice real time. Running a 10-minute simulation will take 5 minutes
A real-time factor of 0.5 means that the simulation runs half real time. Running a 10-minute simulation will take 20 minutes

be added from the Special sensors button as shown in the figure below

The Performance sensor provides the following fields:

Field	Unit	Description
Elapsed wall-clock time	s	Real time (i.e. measured by your clock, independently of Ashes) that has passed since the simulation was started
Real-time factor	-	Ratio of the simulation time step over the wall-clock time taken to simulate it; values greater than 1 mean the simulation runs faster than real time
Real-time factor (average)	-	Average value of the real-time factor since the start of the simulation