From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by yquem.inria.fr (Postfix) with ESMTP id 7EBB7BBA7 for ; Mon, 28 Nov 2005 11:06:40 +0100 (CET) Received: from pih-relay06.plus.net (fuzznuts.plus.net [212.159.14.133] (may be forged)) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id jASA6dDt011921 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NO) for ; Mon, 28 Nov 2005 11:06:40 +0100 Received: from [80.229.56.224] (helo=chetara) by pih-relay06.plus.net with esmtp (Exim) id 1EgfuB-0003JK-0z for caml-list@yquem.inria.fr; Mon, 28 Nov 2005 10:06:39 +0000 From: Jon Harrop Organization: Flying Frog Consultancy Ltd. To: caml-list@yquem.inria.fr Subject: Re: [Caml-list] Efficency of varient types Date: Mon, 28 Nov 2005 10:01:31 +0000 User-Agent: KMail/1.8.2 References: <53c655920511272324w1630fe89y@mail.gmail.com> <20051128.164900.41199864.garrigue@math.nagoya-u.ac.jp> In-Reply-To: <20051128.164900.41199864.garrigue@math.nagoya-u.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200511281001.32158.jon@ffconsultancy.com> X-Miltered: at nez-perce with ID 438AD6AF.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Spam: no; 0.00; caml-list:01 variants:01 integers:01 variants:01 ocaml:01 frog:98 wrote:01 polymorphic:01 polymorphic:01 jacques:01 native:02 caml:02 objective:02 types:02 garrigue:03 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.0.3 On Monday 28 November 2005 07:49, Jacques Garrigue wrote: > More importantly, polymorphic variants are internally encoded as > integers, so there is no representation cost for constant tags. Is pattern matching over constant ordinary variants not more efficient than pattern matching over constant polymorphic variants when compiled to native code? -- Dr Jon D Harrop, Flying Frog Consultancy Ltd. Objective CAML for Scientists http://www.ffconsultancy.com/products/ocaml_for_scientists