How to Optimize physics for mobile?

I'm looking a workaround to make primitive physics could affect the objects aren't 100% real physics, just primitive physics like 50% and better optimization, do you have an idea?

Thanks

Most important: keep the number of polygons to a minimum

the objects are squares, 4 polygons. I doubt the quantity of objects.

Size and Polygon Settings : Try to keep the physic simulation real and not too heavy !

There's an action for lowering the position/velocity iterations

lowering it is supposed to be less cpu heavy but honestly, last time I fiddled with it it didn't make any difference.

There's an action for lowering the position/velocity iterations

lowering it is supposed to be less cpu heavy but honestly, last time I fiddled with it it didn't make any difference.

i fiddled with iteration mode Fixed to Framerate Independent, it made the difference, the blocks position aren't accurate as well, but faster!