Implement Rollout Sampling #6
Description
When rendering many different visualizations (some of which compute stats over the whole rollout set), the visualization can become slow. This is especially true when there are many filters on the rollouts. I think I should make a web worker to hold the rollouts, that will asynchronously update the data of the charts without blocking the UI. The worker could implement sampling to incrementally update the visualizations so there will be fast feedback.