www.fabiankeil.de/sourcecode/privoxy-log-parser/
privoxy-log-parser – A parser for Privoxy log messages
privoxy-log-parser reads Privoxy log messages and:
With privoxy-log-parser, you should be able to increase Privoxy's log level,
without getting confused by the amount of output you get. For example for
debug 64, privoxy-log-parser will (by default) only show messages that
affect the content. If a filter doesn't cause any hits, privoxy-log-parser
will hide the "filter foo caused 0 hits" message.
privoxy-log-parser ships as privoxy-log-parser.pl to make it clear
that it's a Perl script, on most operating systems you can strip the extension.
Run perldoc privoxy-log-parser(.pl) to read the documentation.
In the screen shot above, privoxy-log-parser makes it easier to see which
filters hit the page, and how the content size was affected.
In the screen shot to the left (full version) you see log messages for three different pft requests, the first of them was responsible for the two other ones and is waiting for their results. The colored thread ids make it easy to see which log line belongs to which request.