I have a bunch of blocks which I want interact with when they collider with my Character Controller. Here is the code I am using:

function OnControllerColliderHit(hit : ControllerColliderHit)
{
    renderer.material.color = Color.blue;

    if(hit.gameObject.tag == "Block")
    {
         var block;
         block = hit.gameObject.GetComponent("Block");
         block.collide();
    }
} 

It works, but it's quite slow in computing the collision, there is about a half second delay before the block's collide() method is called.

Is there a faster way to check for collisions with rigidbodies and a character controller?