From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=AWL,SPF_NEUTRAL autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from discorde.inria.fr (discorde.inria.fr [192.93.2.38]) by yquem.inria.fr (Postfix) with ESMTP id E269CBC69 for ; Tue, 10 Apr 2007 02:13:11 +0200 (CEST) Received: from nz-out-0506.google.com (nz-out-0506.google.com [64.233.162.235]) by discorde.inria.fr (8.13.6/8.13.6) with ESMTP id l3A0DBWp011748 for ; Tue, 10 Apr 2007 02:13:11 +0200 Received: by nz-out-0506.google.com with SMTP id l8so1236798nzf for ; Mon, 09 Apr 2007 17:13:10 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=OYkFNzOE74J5o+lHA9ukZCDkpkp0nNOHQDDne230IoQOiODpZ/duWcv+EcDDLQzZmJ4yb9+kUQ8+1mISS84YNejZTlZjsUp0wUyU/TiiqmwvQL1swtHnohI2PB6T4XcS3WOfND95xi/ZasWjzauahl4NbaPC75M1q32Fd2JzcOI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=GfIfNdXwHx8eXp03reOSHApU8G/GgbsaAgWHACi1S2bJ44gKAuZQNXCJ2qtYG6FK2NKKi71Z2PJu1C/0Pc5qZ9iXi8bVaT/J5neX6o34z6vgZQ8LRyjsgx8U2cn/dXIdNa7GB2XwMfoPcRIvYiKV/fQjB3s7AknKLbrrEjC6fzc= Received: by 10.114.208.8 with SMTP id f8mr2546969wag.1176163990224; Mon, 09 Apr 2007 17:13:10 -0700 (PDT) Received: by 10.114.211.2 with HTTP; Mon, 9 Apr 2007 17:13:10 -0700 (PDT) Message-ID: <53c655920704091713g6a7b11f4xc975e8118cd35fa1@mail.gmail.com> Date: Tue, 10 Apr 2007 02:13:10 +0200 From: "David Baelde" Reply-To: david.baelde@ens-lyon.org To: "OCaml Mailing List" Subject: Re: Optimizing Array.blit In-Reply-To: <53c655920704041519t77930d38y52003888139b9d2c@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <53c655920704041519t77930d38y52003888139b9d2c@mail.gmail.com> X-j-chkmail-Score: MSGID : 461AD697.001 on discorde : j-chkmail score : X : 0/20 1 0.000 -> 1 X-Miltered: at discorde with ID 461AD697.001 by Joe's j-chkmail (http://j-chkmail . ensmp . fr)! X-Spam: no; 0.00; blit:01 blit:01 camlprim:01 val:01 val:01 timings:01 blits:01 arrays:01 0.17:98 0.19:98 int:01 int:01 caml:02 optimizing:02 len:02 Hi again, To answer the question by myself, I have ran a few tests. It turned out that specializing Array.blit provides a significant boost, but doing such an ugly hack was dangerous and unnecessary. I now use the following standard code: CAMLprim value caml_float_array_blit(value _src, value _src_off, value _dst, value _dst_off, value _len) { int src_off = Int_val(_src_off) ; int dst_off = Int_val(_dst_off) ; int len = Int_val(_len) ; int i ; for (i=0 ; i