https://www.youtube.com/watch?v=naTRzjHaIhE
at 3038 shadow proxy server
276 gems
at 7:40 rake stats
html 200 ms
api 80 ms
28 minutes "chanko" 'unit' has model, view, controller (those units sound a lot like what I might call features in 'facets') gem-chanko
talk-scaling-a-large-monolithic-rails-app#side-by-side-testing1 At 29:57 he talks about how they upgrade (side by side testing): https://www.youtube.com/watch?v=naTRzjHaIhE&t=29m57s
He talks about saving the HTTP responses returned by the current version of Rails and diffing them with the HTTP responses returned when they update the version of Rails. It's a black box test, where the externally facing behavior of the current version of the app becomes the gold master, and the new version of the app must have the same external behavior.
talk-scaling-a-large-monolithic-rails-app#side-by-side-testing1
Save response body in after :each (seems similar to our concept of checking for system health after each spec)