Physics P2 optimize for game without collision

[horror812]

Hi all

am use physics P2, but i want a little optimize. 

I do not want the real-physics for me  is enough just intersection (circle..box...) because in my game all objects it's sensor.

what can be done?

For start, i want decrease step in world,  how - it's possible (im use typescript and can't change source)?  - what more?

 

or better override arcade physics (to add customize circle-separate?)

Thanks