From owner-freebsd-arch@FreeBSD.ORG Mon Jan 12 15:25:12 2009 Return-Path: Delivered-To: freebsd-arch@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1079C1065670 for ; Mon, 12 Jan 2009 15:25:12 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.freebsd.org (Postfix) with ESMTP id C7BDA8FC1B for ; Mon, 12 Jan 2009 15:25:11 +0000 (UTC) (envelope-from des@des.no) Received: from ds4.des.no (des.no [84.49.246.2]) by smtp.des.no (Postfix) with ESMTP id 3CBB46D43F; Mon, 12 Jan 2009 15:06:44 +0000 (UTC) Received: by ds4.des.no (Postfix, from userid 1001) id 15F53844ED; Mon, 12 Jan 2009 16:06:44 +0100 (CET) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: d@delphij.net References: <4966B5D4.7040709@delphij.net> Date: Mon, 12 Jan 2009 16:06:44 +0100 In-Reply-To: <4966B5D4.7040709@delphij.net> (Xin LI's message of "Thu, 08 Jan 2009 18:26:28 -0800") Message-ID: <86zlhw5zsr.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-arch@FreeBSD.org Subject: Re: RFC: MI strlen() X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Jan 2009 15:25:12 -0000 Xin LI writes: > Here is a new implementation of strlen() which employed the bitmask > skill in order to achieve better performance on modern hardware. Why bother? Do we have code that uses strlen() heavily in performance- critical regions? Does anybody? DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no