How Collider effect the fps?

Questions & Answers
1

Is a collider every time active and will effect the fps even there is no rygidbody and no raycast?

Thanks in advance!!:wink:

2

When a collider has no rigidbody it is treated as static collider by Unity. And in each fixed update the colliders are checked for collision so yes they do take up CPU cycles for computation.

I do not have exact idea on how but Unity performs some optimizations on static colliders to increase performance.

All this is mentioned here on this page from Unity manual: Colliders