I've been rebuilding my blog to have an ember front end and a rails backend (you're currently on it, but shhhhh it's not final).
Before gzipping everything my assets weighed in around 700kb. Which is a lot for a blog site that has almost nothing really to it.
It's up to you to handle your asset gzipping when you're hosting on heroku. After trying out 3 different gems and playing around with some broccoli plugins I found a super simple soultion that brings my total site weight down to 249kb. NICE! Here are the two easy steps I took to get that:
config/envoriments/productionfile add this line:
config.ru file looks like this:
# This file is used by Rack-based servers to start the application. require ::File.expand_path('../config/environment', __FILE__) use Rack::Deflater run Rails.application
After those changes you're well on your way to having nice gzipped assets! Yay!