Dan,
When you say the huge amount of data is slowing the load, are you referring to the size of the Edit event logs? That wouldn't make sense since I thought the data is all pre-computed and loaded from the TSVs every time you load the page.
Anyway, as a heads-up to everyone, new data generation for that dashboard has been disabled since those logs have gotten too big. We've already reduced the volume of new Edit events to 20% of previous by increasing the sampling, and the DBAs are going to randomly purge existing events (
https://phabricator.wikimedia.org/T124676). Once that's done, we can turn the computations back on (
https://phabricator.wikimedia.org/T126058).