Closed system, without losing velocity

[kujma10-zz]

I'm creating the same system as it is described here, however I need to have many objects (balls) instead of one. At first they move and hit each other (I want this to continued forever), but then they are getting slow and are losing the force. inertia: Infinity is helpful but there is still something that make balls to lose velocity.

Do you have any suggestions how to make this kind of world 'ideal' ?
Thank you.

[liabru]

See #256 which discusses the same problem and leave a comment with a jsfiddle example if you can. This will help me when I investigate. For now make sure that body.friction and body.frictionAir are both set to 0 and see if it helps. Thanks!

[kujma10-zz]

Left a comment there with jsfiddle example, thanks.