General notification in case there are others consuming from eventlogging_NavigationTiming: The performance team recently instituted oversampling of data based on configurable criteria. This means that in some cases, the data stream on this topic may not be representative of wiki users generally.

If you wish to parse NavigationTiming data in a representative way, you should check the attribute 'is_oversample' in the event object, and filter out the message if true. (In the event that a single page load is part of the regular sample as well, two messages will be emitted with the same data, but with different values for the is_oversample parameter.)

Please let me know if you have any questions.

- Ian