Re: [tor-talk] Performance

[Martin S <shieldfire@xxxxxxxxx>]

Apart from the quoted docs, I was more thinking a detailed
how-to/why-for kindof thing.

/Martin S

2014-08-13 23:05 GMT+02:00 Roger Dingledine <arma@xxxxxxx>:
> On Wed, Aug 13, 2014 at 03:18:23PM -0500, Joe Btfsplk wrote:
>> The Privoxy part of the chain could be an issue.  What is your
>> reason for using Privoxy?
>> In general, I find Tor to be faster overall, since overhauls in
>> TorBrowser - when they stopped using Privoxy (& likely started other
>> speed increasing methods).
>> Other network changes could be partly responsibility for increased speed.
>
> Privoxy will be slower for two reasons:
>
> A) It doesn't do the pipelining, etc that your browser can do. Earlier
> versions of privoxy would fetch the whole page before passing any of
> it to the browser. Maybe newer versions of Privoxy are smarter, but I
> bet there are still web performance features that it disables by adding
> another link in the chain.
>
> B) It doesn't make use of Tor's "optimistic data" feature, which sends
> the first chunk of application-level data along with the begin cell,
> effectively cutting out one of the two round-trips for a new page fetch.
> https://trac.torproject.org/projects/tor/ticket/3890#comment:11
> https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/181-optimistic-data-client.txt
> https://gitweb.torproject.org/torbrowser.git/blob/HEAD:/src/current-patches/firefox/0027-Use-Optimistic-Data-SOCKS-variant.patch
>
> I guess the broader question is what the original poster was trying
> to do -- if the goal is to give Tor's protection to everybody in the
> organization, and the way they did it was to leave everybody using
> Internet Explorer, and then redirect outgoing traffic into Privoxy
> which sends it through Tor, then the users are missing out on all
> the application-level privacy and security features that Tor Browser
> gives you:
> https://www.torproject.org/projects/torbrowser/design/
>
> --Roger
>
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-- 
Regards,

Martin S
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