if d.isScanner {
					globalScannerMetrics.incTime(scannerMetricYield, wantSleep)
				}
			}
			return
		case <-timer.C:
			if d.isScanner {
				globalScannerMetrics.incTime(scannerMetricYield, wantSleep)
			}
			return
		case <-cycle:
			if !timer.Stop() {
				// We expired.
				<-timer.C
				if d.isScanner {
					globalScannerMetrics.incTime(scannerMetricYield, wantSleep)
				}