Well, it would check collissions indeed, but since they start colliding when there are just a few spawn, the instances never get very high. I think it will do wonders. All the yarn instances + opponents is really doing a heavy toll
wall I did do a test one time to see if the yarn was make the game lag but I spawned like 4000 and I had 60fps and my pc has like 5 to 6 gb of ram.