incremental costs of making more objects.  was testing with 10,000 of them.

799.5392 bytes per DJabberd::saxhandler created.
8289.614 bytes more per DJabberd::XMLParser (libxml) parser created, on top of the saxhandler

# my $sock; socket($sock, PF_INET, SOCK_STREAM, IPPROTO_TCP);
# { sock => $sock }
rss = 17846272 (gain of 6004736, 600.4736 each)

# DJabberd::Connection::ClientIn->new($sock, $server);
rss = 114565120 (gain of 102592512, 10259.2512 each)

# $p->parse_chunk_scalarref(\ "<foo ");
rss = 140451840 (gain of 128438272, 12843.8272 each)