GitLab

Use the Stringer interface on the snapshot.

This way, we can find and remove, e.g., old meters.

We use an idle rate now, not an idle timeout.

(still need work but better than nothing)

and improve re-registration documentation

We reset it to zero when unregistering so this is more accurate.

This allows us to do *one* atomic operation in the fast path.

This allows us to avoid mistaking really bursty traffic as idle.

It also saves us a few bytes...