in geronimo-metrics-common/src/main/java/org/apache/geronimo/microprofile/metrics/common/MeterImpl.java [91:105]
public double getMeanRate() {
final long count = getCount();
if (count == 0) {
return 0;
}
final long duration = System.nanoTime() - initNs;
if (duration == 0) {
return 0;
}
final long seconds = TimeUnit.NANOSECONDS.toSeconds(duration);
if (seconds == 0) {
return 0;
}
return count * 1. / seconds;
}