The proposal to be explicit is fine, but there are alternative proposals which avoid this problem too: - Only tail recurse once the stack is n objects deep. Ha

The proposal to be explicit is fine, but there are alternative proposals which avoid this problem too: - Only tail recurse once the stack is n objects deep. Having a 10,000 element stack trace isn't helpful. - Keep a log of which functions were called, but not a full stack trace of each call. That's O(1). I mentioned both of those in my post.