Comment 3 for bug 597838

After getting the 'karl.tagging' test coverage to 100%, I have checked in
an optimization of getFrequency, avoiding intermediate calls to
'getTags' and 'getTagBojects' and the unnecessary creation of unused
intermediary data structures.

It would be useful if somebody with better knowledge of the current
deployment enviroment could test any speedup using production or
near-production data.