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From: Chris Hecker <checker@d6.com>
To: caml-list@inria.fr
Subject: [Caml-list] why does hashtbl not use lists?
Date: Tue, 10 Jul 2001 01:34:25 -0700	[thread overview]
Message-ID: <4.3.2.7.2.20010710013127.02c06600@shell16.ba.best.com> (raw)


Why does hashtbl.ml (from the standard library) use the bucketlist variant instead of just the built in lists with tuples?  Is there an efficiency thing going on here?

type ('a, 'b) t =
  { mutable max_len: int;                     (* max length of a bucket *)
    mutable data: ('a, 'b) bucketlist array } (* the buckets *)
and ('a, 'b) bucketlist =
    Empty
  | Cons of 'a * 'b * ('a, 'b) bucketlist

instead of 

type ('a, 'b) t =
  { mutable max_len: int;                     (* max length of a bucket *)
    mutable data: ('a * 'b) list array }      (* the buckets *)

Chris

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             reply	other threads:[~2001-07-10  8:33 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-07-10  8:34 Chris Hecker [this message]
2001-07-10  9:00 ` Fergus Henderson
2001-07-10  9:05 ` Jean-Christophe Filliatre
2001-07-10  9:42   ` Fergus Henderson
2001-07-10 14:44     ` Xavier Leroy
2001-07-10 17:04 Charles Martin

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