IBase.ExecutionDuration
val pp : prefix:string -> Stdlib.Format.formatter -> t -> unit
val zero : t
val counter : unit -> counter
val wall_time : t -> Mtime.span
val total_useful_s : t -> float
seconds of user plus system time
val timed_evaluate : f:(unit -> 'a) -> 'a evaluation_result
val log : prefix:string -> Logging.debug_kind -> t -> unit
log to debug logs and to Scuba
val to_scuba_entries : prefix:string -> t -> LogEntry.t list