I need to check, How much "time" greenstone takes to fetch the
result for the given query?

I mean, i have to find the "Time Taken" between the 'query' given
and the 'results' returned from the DataBase by the search engine.

Where can i find the info. regarding this? or
Do i need to write any script to find this?
if so, where shall i insert that script?

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Thank you
Anandh