in atlas-core/src/main/scala/com/netflix/atlas/core/util/UnitPrefix.scala [125:135]
def duration(value: Double): UnitPrefix = {
math.abs(value) match {
case v if isNearlyZero(v) => sec
case v if !JDouble.isFinite(v) => sec
case v if v >= sec.factor =>
durationBigPrefixes.find(_.factor <= v).getOrElse(year)
case v if v < 1.0 =>
durationSmallPrefixes.find(_.factor <= v).getOrElse(picos)
case _ => sec
}
}