Maybe a formula can be used, something like this: 


sigma(nodes in thread){reputation/(days old) * some_weight}

It seems that it would not be very difficult to periodically update thread heads with this "popularity" index.

Update: hmm. I guess I did suggest changing the site itself. My bad.

In reply to Re: Tracking popularity of Perl discussion topics by dmitri
in thread Tracking popularity of Perl discussion topics by allolex

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