Topic: question concerning dissipation in concretedpm2

I have question concerning the meaning of "$define keep_track_of_dissipated_energy" in src/sm/Materials/ConcreteMaterials/concretedpm2.h.
Is the purpose is to switch on or off the dissipation calculation to save time?
If yes, how is it switched on or off. From the input or do I need to change something in the code?