From owner-freebsd-current@FreeBSD.ORG  Mon May 11 23:06:40 2015
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id D108C4A7
 for <current@freebsd.org>; Mon, 11 May 2015 23:06:40 +0000 (UTC)
Received: from mail-wg0-x22a.google.com (mail-wg0-x22a.google.com
 [IPv6:2a00:1450:400c:c00::22a])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 67AF31982
 for <current@freebsd.org>; Mon, 11 May 2015 23:06:40 +0000 (UTC)
Received: by wggj6 with SMTP id j6so7605066wgg.3
 for <current@freebsd.org>; Mon, 11 May 2015 16:06:38 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=sender:date:from:to:subject:message-id:mime-version:content-type
 :content-disposition:user-agent;
 bh=TNFhjXHnhcUqyN2PVzODkpY6EZeXfjhxhCzY9BZfEMU=;
 b=NJ6oupuSxbOXDeZlT6FvT/XZJ+nvRdw78SjI/S2/4Bp0Fi+XkWKNTp9wyATOwV6kks
 5SBFKnt0ARgVk80NFznnaqZd1Wnc2WM89KVYSseF3Rr8OdsL1L0e0jXUJpJZwexyONRU
 /9VO/I6PdGHkEvwb9wlWsoy66WgP7Ui5+9oUDDm+uHMQzjkbwvfFTJnl6Y2uH6VTIWii
 n9amLGs3pWjywMavUlG0iLum3iHyeSG3yaaK+vpR516uUVT+RM9eQW0B2D0+jXkVCKQb
 Q09sKnzmMXicWmK7VnZjIP1gZ/r7GZdk43axZdOUSsC6NgZkDb+/XSKjN9UJEbyhjU3l
 ThFg==
X-Received: by 10.180.88.99 with SMTP id bf3mr24538368wib.75.1431385598801;
 Mon, 11 May 2015 16:06:38 -0700 (PDT)
Received: from ivaldir.etoilebsd.net ([2001:41d0:8:db4c::1])
 by mx.google.com with ESMTPSA id n1sm47042wix.0.2015.05.11.16.06.37
 for <current@freebsd.org>
 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Mon, 11 May 2015 16:06:37 -0700 (PDT)
Sender: Baptiste Daroussin <baptiste.daroussin@gmail.com>
Date: Tue, 12 May 2015 01:06:35 +0200
From: Baptiste Daroussin <bapt@FreeBSD.org>
To: current@FreeBSD.org
Subject: Increase BUFSIZ to 8192
Message-ID: <20150511230635.GA46991@ivaldir.etoilebsd.net>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
 protocol="application/pgp-signature"; boundary="k+w/mQv8wyuph6w0"
Content-Disposition: inline
User-Agent: Mutt/1.5.23 (2014-03-12)
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 11 May 2015 23:06:40 -0000


--k+w/mQv8wyuph6w0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

Hi,

I would like to change the default value of BUFSIZ to 8192.

After testing various applications that uses BUFSIZ like changing it in libmd I
can often see performance improvements:

For example with md5(1):
Current BUFSIZ (1024)
0.13 real         0.04 user         0.09 sys
New BUFSIZ (8192)
0.08 real         0.04 user         0.03 sys

sha256(1):
Before:
0.44 real         0.39 user         0.04 sys
After:
0.37 real         0.35 user         0.01 sys

This is done on a small amd64 Lenovo S20 laptop

Review available here:
https://reviews.freebsd.org/D2515

Any opinion?
Best regards,
Bapt

--k+w/mQv8wyuph6w0
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iEYEARECAAYFAlVRNfsACgkQ8kTtMUmk6Ews+wCgkk/8OWO/DVpvzFgpPqgwhxaj
7dkAoJQw0rRLbnpNL3gdr7BprYWnZOnH
=yWcN
-----END PGP SIGNATURE-----

--k+w/mQv8wyuph6w0--