When are the web traffic (report) statistics calculated?
Traffic statistics begin populating for pages as soon as the page is created. This information is stored in the NetCommunity database and becomes viewable once the web traffic report is added to the site. Therefore, whether the part is on a page or not, the traffic information is being populated and stored into the database.
For additional information on how the statistics are calculated, see the 'Report information' section for the break-down.