Speed of pg_dump -l -s (List Schema) Variations

Hello!

I have a small database (10MB gz dump). When I do a pg_dump -l -s (to
list the schema) of the original database it takes below 1 second. But
when I do dump of a copy of the database (using a full restore into a
new DB) it takes like 10-15 seconds to do the schema list (pg_dump -l
-s). I need to compare the schemes of about 20 tables and this takes a
while... Anyone have any ideas ? I can't figure out why the newly
created copy would be so much slower.

Thanks

/Otto Blomqvist