How does one change the connection pool size in Rails when hosting on Heroku? Watsi's post on setting AR's connection pool size uses the latest and greatest from both Puma and Sidekiq to achieve this.

The commit that made it real. Right now Rubinius supports multiple Ruby versions (1.8 & 1.9) in one executable. Rubinius 2.0 will build the executable with only 1 mode. So no more rbx -X19.

A great article by Pan Thomakos on speeding up Rails boot time by using `require: false` in your Gemfile.