func newDelayingQueue(clock clock.Clock, name string) DelayingInterface {
ret := &delayingType{
Interface: NewNamed(name),
clock: clock,
heartbeat: clock.Tick(maxWait),
stopCh: make(chan struct{}),
waitingTimeByEntry: map[t]time.Time{},
waitingForAddCh: make(chan waitFor, 1000),
metrics: newRetryMetrics(name),
}
go ret.waitingLoop()
return ret
}
func sinceInMicroseconds(clock clock.Clock, start time.Time) float64 {
return float64(clock.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds())
}