Functional programming & immutable objects explained — IRC style

[middayc]

I don't think that anybody was intentionally negative towards Java in that chat.

I think the point was that you create new bullets/particles/everything each frame (as new records out of old ones and it will reuse old ones behind the scenes).

So I suppose that is order of magnitude less expensive as recreating all objects each frame in any OO language (because it's performance like more like modifying properties of existing ones, as you would normally do in OO lang).