val time : unit -> [ `Time ] tRead the current monotonic time.
val (+) : 'a t -> [ `Interval ] t -> 'a tval (-) : 'a t -> [ `Interval ] t -> 'a tval interval : [ `Time ] t -> [ `Time ] t -> [ `Interval ] tval of_nanoseconds : int64 -> _ tConversions. Note: still seconds since boot.