NewLimiter returns a new Limiter that allows events up to rate r.

NewRateCollector is shorthand for newRateCollector(window, granularity, time.Now()).

Inf is the infinite rate limit; it allows all events.

A Limiter controls how frequently events are allowed to happen.

RateCollector helps to collect and calculate values (like throughput, QPS, TPS, etc...), It implements a sliding window with custom size and granularity to store values.

Limit defines the maximum frequency of some events.