Every converts a minimum time interval between events to a Limit.

NewLimiter returns a new Limiter that allows events up to rate r and permits bursts of at most b tokens.

Inf is the infinite rate limit; it allows all events (even if burst is zero).

InfDuration is the duration returned by Delay when a Reservation is not OK.

A Limiter controls how frequently events are allowed to happen.

A Reservation holds information about events that are permitted by a Limiter to happen after a delay.

Limit defines the maximum frequency of some events.