8 -> wall_time_group_by_size:float
9 -> wall_time_group_by_head:float
10 -> wall_time_group_by_digest:float
11 -> proc_time_all:float
12 -> proc_time_group_by_size:float
13 -> proc_time_group_by_head:float
14 -> proc_time_group_by_digest:float
18 : t -> size:int -> unit
20 : t -> size:int -> unit
26 : t -> size:int -> unit
28 : t -> size:int -> unit
29 val file_unique_sample
30 : t -> size:int -> unit
32 : t -> size:int -> unit
36 : t -> size:int -> unit