Forem slower the more topics it gets

[c2169000]

I'm using Forem with PostgreSQL and experience 20+ sec delays after getting around 1000+ topics. The less topics the faster the topics controller loads.

Prior to this I've made sure I'm not querying any 3rd party services. I've looked for clues with rack-mini-profiler as well as pages like these:

• http://stackoverflow.com/questions/909225/first-request-to-rails-app-is-very-slow
• http://stackoverflow.com/questions/680302/how-can-i-find-out-why-my-app-is-slow
• http://stackoverflow.com/questions/23703792/rails-3-2-ruby-1-9-and-unicorn-the-first-request-is-very-slow-how-to-debug