I'm playing around with Google's "Page Speed" extension for Chrome, and it's (rightfully!) pointed out to me that /text.js, /statistics/view.js, and /statistics/dataset/* aren't compressed, and that this could improve things. Looking at MBS-3168, it looks like only a few types are gzip'd by the load balancer; adding application/json and the various javascript content-types (we're serving at least text/javascript and application/x-javascript) would be nice.

Specifically, for the default timeline page, it tells me: "Compressing the following resources with gzip could reduce their transfer size by 481.5KiB (80% reduction)." and then lists text.js, view.js, and all the datasets on the default graph.