Thread:Extension talk:FrequentPatternTagCloud/Performance hit?

Since installing this extension, the whole server on which my wiki runs is a lot slower. Of course, this may be coincidence: I'm about to 'uninstall' to find out: which seems to mean commenting out the require_once line, and deleting the two tables.

However, I'm curious that the two database tables are huge: the standard 'text' and 'revision' tables each have <4,000 records (to give an idea of the size of my teams wiki), but fptc_items has ~389,897 and fptc_associationrules has ~57,773. Is this normal? I.e. do I need to arrange to have a much more high performance database if I install fptc? Or has something gone wrong with my fptc installation?