guardian/frontend — pull request #522 by stephanfowler (2013-03-11 12:50:32+00:00)
Title: Most Popular trailblock, for Story package

Depends on shared counts and comment counts gathered by the story admin tool. These are out of date but still indicative, so are used for the calculation but not actually displayed.

The decayed measure for performance for an article is calculated as:
(shares+comments/2) / (max(1, days since publication)^1.5)