Mongo Rails 3 Instrumentation
Records how long your rails app spends in Mongo, and outputs it to the log, i.e.:
Completed 200 OK in 1535ms (Views: 623.3ms | Mongo: 848.2ms)
To use, just add the gem to your Gemfile and restart your app:
gem 'mongo-rails-instrumentation', '~>0.2'
It's been tested with rails 3.0, and should work with rails 3.1 too.
This gem's home is on github at github.com/freerange/mongo-rails-instrumentation, so please add comments, suggestions and improvements there. All code is released under the MIT License.