Show references
$ bundle
$ rake db:migrate
$ RAILS_ENV=production rake db:migrate
$ ruby stats.rb $(RAILS_ENV=production RUBYOPT='-I. -rx' ruby -I. -e'require "config/environment"; GC.start; puts ObjectSpace.dump_all.path')
Many strings are allocated here:
"file"=>"/Users/aaron/git/rails/activesupport/lib/active_support/dependencies.rb", "line"=>302
But I can't find what is holding a reference.