[Privoxy-users] Privoxy on a Raspberry Pi

[Phyks]

Hi,

I tried to debug it further. Here are some tests with the current settings.

Using Privoxy home page:
* Without Privoxy, the main HTML takes around 80ms to load.
* With Privoxy, it takes around 500ms to load, if I reload the page
(even clearing the browser cache), it drops to about 80ms which is in
agreement with the without Privoxy case.

(Screenshots available at
https://lutim.phyks.me/gallery#jqNGoAnQ/86EWpbzr.png,Q23nsaOT/1XMA8IBi.png,
put online as I am unsure about the policy with attached images on this ML)


If I do the same test with http://clubic.com,
* Without Privoxy, the main HTML takes around 54ms to load.
* With Privoxy, it takes around 1.5s and this is reproducible even if I
reload immediately the page.


Looking at htop in parallel, Privoxy is spawning multiple processes
(about 10) and CPU load goes from 3% to around 100%, used by these
processes.

The Raspberry Pi and my laptop are on the same local network, and the
Raspberry Pi is wired with 100M ethernet to the router, so the network
itself should be out of troubles.


Looking at the log as stated in the contact page
(https://framadrop.org/r/6j81o2D1m0#XNEfEVjRtqAXaHHI3YMRH3jtKRfxKdm7EADyfL/yEHk=),
it
seems that Privoxy is taking 1.5s to actually load the HTML content from
the remote server.

However,

```
$ time curl http://www.clubic.com -s > /dev/null

real    0m0.291s
user    0m0.120s
sys 0m0.030s
```
so that it seems to be a problem related to Privoxy itself (and not due
to some network limitation on the Raspberry Pi or whatever like this).


Thanks!
-- 
Phyks

Le 14/03/2017 à 19:50, Fabian Keil a écrit :
> Phyks <phyks at phyks.me> wrote:
> 
>> I installed Privoxy on Raspbian (latest, Debian derived, based on
>> Jessie) through the repositories (version 3.0.21-7+deb8u1 installed).
>> Everything is running on a regular Raspberry Pi 1.
> 
> Note that the current Privoxy version is 3.0.26 which means
> you are missing out on a bunch of changes including various
> performance improvements:
> http://ijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/ChangeLog?view=markup
> 
> Our current versioning scheme is a bit silly and we only bump
> the last number.
> 
>> When I browse to any page (default configuration, no extra actions /
>> filter added yet), the CPU usage goes to 100% on the Raspberry Pi, and
>> it takes a few seconds to actually proxy the page, increasing the load
>> time from a few milliseconds to some seconds.
> 
> That seems unreasonably slow to me, too.
> 
>> I was wondering if anyone had experience with a similar setup and could
>> give me some input about the performances of the system. Also, is there
>> anything I could do to make it lighter?
> 
> If you enable the debug directives recommended at:
> https://www.privoxy.org/user-manual/contact.html
> the log file should help to diagnose the issue.
> 
> Please reproduce the problem with logging enabled and provide
> a log excerpt.
> 
> Please also double check that the CPU usage is actually
> caused by Privoxy itself.
> 
> Fabian
>