Independent Tick for Physics and Frame Rendering


I ran into a problem of low frame rates when I added objects into scene with Physics enabled. These include static meshes, actors with Physics and lots of Cloth meshes. Using Profiler I found that the problem was caused by CPU Stall which in turn was caused by something called TG_PostPhysics. Documents say it is also some kind of Tick function which calculates physics simulation each frame.

How can I optimize the Physics since I need to use a lot of Physics enabled meshes in my project. I know that running the tick independent of frame render will produce error results. So what is the best way to approach this problem?