HashMap.IntSpecalized when key type is int, more efficient than the generic type
val make : hintSize:int -> 'b tval clear : 'b t -> unitval isEmpty : _ t -> boolsetDone tbl k v if k does not exist, add the binding k,v, otherwise, update the old value with the new v
val size : _ t -> intval valuesToArray : 'a t -> 'a arrayval getBucketHistogram : _ t -> int arrayval logStats : _ t -> unit