Performance Differences in Rails 3 and Rails 2
After upgrading an application to Rails 3 everything seemed slow. Requests were taking a few seconds - even when connected to the local development machine. To verify, I created identical demo Rails 2.3.8 and Rails 3.0.0 applications for benchmarking (found here). To run the tests, first install RVM by following the instructions found here. Then feel free to experiment switching between Ruby 1.8.7 and 1.9.2 (or whatever Ruby version you have on hand).