So i am trying to build a buck converter which requires switching at high frequencies. Before making the whole circuit however, i decided to use a circuit simulation software so that i can experiment with the values of the components and trying to see if a concept works or not. However, the problem comes when simulating the circuit. the simulation time will come down to a snail's pace that it would take a long time to get proper results. I've tried using multiple simulators such as proteus and multisim. Both of them perform poorly when working on high frequencies. Is there any way to lighten the workload for simulating these sorts of circuits?