From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id LAA01169; Wed, 14 Jul 2004 11:34:02 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id LAA01075 for ; Wed, 14 Jul 2004 11:34:01 +0200 (MET DST) Received: from smtp3.adl2.internode.on.net (smtp3.adl2.internode.on.net [203.16.214.203]) by concorde.inria.fr (8.12.10/8.12.10) with ESMTP id i6E9XwSH004161 for ; Wed, 14 Jul 2004 11:34:00 +0200 Received: from [192.168.1.200] (ppp216-145.lns1.syd3.internode.on.net [203.122.216.145]) by smtp3.adl2.internode.on.net (8.12.9/8.12.9) with ESMTP id i6E9XuHY045710 for ; Wed, 14 Jul 2004 19:03:57 +0930 (CST) Subject: [Caml-list] int hash From: skaller Reply-To: skaller@users.sourceforge.net To: caml-list Content-Type: text/plain Message-Id: <1089797635.29648.472.camel@pelican.wigram> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 14 Jul 2004 19:33:56 +1000 Content-Transfer-Encoding: 7bit X-Miltered: at concorde with ID 40F4FE07.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Loop: caml-list@inria.fr X-Spam: no; 0.00; hash:01 sourceforge:01 hashtables:01 hash:01 suitably:01 hashtable:01 9660:01 glebe:01 int:01 nsw:01 snail:02 checkout:02 2037:03 allocated:03 integers:05 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk I'm currently using a lot of hashtables with sequentially allocated integers as keys. It occurs to me a custom hash function just masking in the low n bits would be a good hash function, and very fast, assuming n is chosen suitably and related somehow to the table size. (size=2^n?) .. any comments on the performance of a hashtable with such a hash function? -- John Skaller, mailto:skaller@users.sf.net voice: 061-2-9660-0850, snail: PO BOX 401 Glebe NSW 2037 Australia Checkout the Felix programming language http://felix.sf.net ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners