Delivery-Date: Wed, 10 Dec 2014 22:26:03 -0500
Return-Path: <tor-talk-bounces@lists.torproject.org>
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on moria.seul.org
X-Spam-Level: 
X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED,
	RP_MATCHES_RCVD,URIBL_BLOCKED autolearn=ham version=3.3.1
X-Original-To: archiver@seul.org
Delivered-To: archiver@seul.org
Received: from eugeni.torproject.org (eugeni.torproject.org [38.229.72.13])
	(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by khazad-dum.seul.org (Postfix) with ESMTPS id F05861E0FBA;
	Wed, 10 Dec 2014 22:26:01 -0500 (EST)
Received: from eugeni.torproject.org (localhost [127.0.0.1])
	by eugeni.torproject.org (Postfix) with ESMTP id B4BA331F80;
	Thu, 11 Dec 2014 03:25:57 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
 by eugeni.torproject.org (Postfix) with ESMTP id D4E3431F39
 for <tor-talk@lists.torproject.org>; Thu, 11 Dec 2014 03:25:53 +0000 (UTC)
X-Virus-Scanned: Debian amavisd-new at 
Received: from eugeni.torproject.org ([127.0.0.1])
 by localhost (eugeni.torproject.org [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id 2qTv2FaZrqpz for <tor-talk@lists.torproject.org>;
 Thu, 11 Dec 2014 03:25:53 +0000 (UTC)
Received: from khazad-dum.seul.org (khazad-dum.csail.mit.edu [128.31.0.47])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "moria.seul.org", Issuer "moria.seul.org" (not verified))
 by eugeni.torproject.org (Postfix) with ESMTPS id B924331F08
 for <tor-talk@lists.torproject.org>; Thu, 11 Dec 2014 03:25:53 +0000 (UTC)
Received: by khazad-dum.seul.org (Postfix, from userid 501)
 id 63ED71E0FBD; Wed, 10 Dec 2014 22:25:49 -0500 (EST)
Date: Wed, 10 Dec 2014 22:25:49 -0500
From: Roger Dingledine <arma@mit.edu>
To: tor-talk@lists.torproject.org
Message-ID: <20141211032549.GE34412@moria.seul.org>
References: <22b9f013c8ef0f36b66963a8edc23f2c@subvertising.org>
 <54890250.7030600@riseup.net>
 <5cf56ef1f8f78a360d93f593f5fc7758@subvertising.org>
 <d685915ad65e2ba6fa5e421d959bd41d@cryptolab.net>
MIME-Version: 1.0
Content-Disposition: inline
In-Reply-To: <d685915ad65e2ba6fa5e421d959bd41d@cryptolab.net>
User-Agent: Mutt/1.5.20 (2009-12-10)
Subject: Re: [tor-talk] Tor network too fast
X-BeenThere: tor-talk@lists.torproject.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: tor-talk@lists.torproject.org
List-Id: "all discussion about theory, design,
 and development of Onion Routing" <tor-talk.lists.torproject.org>
List-Unsubscribe: <https://lists.torproject.org/cgi-bin/mailman/options/tor-talk>, 
 <mailto:tor-talk-request@lists.torproject.org?subject=unsubscribe>
List-Archive: <http://lists.torproject.org/pipermail/tor-talk/>
List-Post: <mailto:tor-talk@lists.torproject.org>
List-Help: <mailto:tor-talk-request@lists.torproject.org?subject=help>
List-Subscribe: <https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk>, 
 <mailto:tor-talk-request@lists.torproject.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: tor-talk-bounces@lists.torproject.org
Sender: "tor-talk" <tor-talk-bounces@lists.torproject.org>

On Wed, Dec 10, 2014 at 10:05:36PM -0500, Griffin Boyce wrote:
> Sieme wrote:
> >I think so too. But what's the default policy now? 3 hops?
> 
> It's three hops. 100ms is pretty short, but not ridiculously so.

In particular, a lot of the slowness of Tor before (and still, if
you get unlucky) is because of queueing inside the relays. Tor isn't,
and never was, slow because of network latency. It's slow (when it is)
because other people are using it at the same time, and their traffic
is going through before yours so yours has to wait its turn. And it gets
especially bad when the relay you and the other person have selected is
rate limiting such that the relay stops and sits on your traffic data
until it's willing to send some more of it.

That's why designs like KIST can show such dramatic improvements (in the
lab, but I'm hopeful they will show improvements in reality too)
http://freehaven.net/anonbib/#jansen14-kist
because they do a better job of prioritizing the cells that will
actually get through, rather than choosing ones that will just end up
waiting anyway.

--Roger

-- 
tor-talk mailing list - tor-talk@lists.torproject.org
To unsubscribe or change other settings go to
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk

