We’re thrilled to announce that all of our apps have been upgraded from REE to Ruby 1.9.3. We wanted to share some notes about what went well, what went wrong, and what we learned in the process. The Payoff The vertical red line marks our update to Ruby 1.9.3, and as you can see, the results were impressive (lower is better). Our average response time dropped from around 150ms per request to aroun