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