Time.SpanTime spans
val zero : spanzero is a span of 0ns.
val one : spanone is a span of 1ns.
val max : spanmax_span is a span of 2^64-1ns.
val to_uint64_ns : span -> int64to_uint64_ns s is s as an unsigned 64-bit integer nanosecond span.
val of_uint64_ns : int64 -> spanof_uint64_ns u is the unsigned 64-bit integer nanosecond span u as a span.
pp formats with Fmt.uint64_ns_span.