* Pluck over map
* Explain why map makes sense there
* Refactor reactions controller a bit and iterate only once
* Use group by instead of N counting queries
* More positive
* Simplify BufferedArticlesController
* Less queries for MailchimpBot
* Use Rails instead of SQL
* Build comment_ids only when needed
* Add test sampler
* Use let! and let_it_be for article_spec.rb
* Regroup and restructure expectations and tests
* Move private methods in private
* Decrease the needed objects in .seo_boostable test
* Re-use the user
* Newlined
* Add delayed_job_web to dev environment for debugging
* Add specs for the current Follow callbacks implementation
* Move follower touching to ActiveJob
* Spec for the touch followers job
* Move Follow#create_chat_channel to ActiveJob and make the job safe
* Add ActiveJob to send email notifications about follows
* Enqueue SendEmailNotificationJob after the follow is created
* Specs to wnsure jobs are enqueued on Follow creation
* Make CreateChatChannelJob queue name more specific
* Reaction specs for Reaction after_save callbacks logic
* Touch user job
* Call Users::TouchJob on reaction create
* Move updating reactable to a separate job
* Move busting reactable cache to a separate job
* Bust homepage cache after reaction save in a separate job
* Spec for enqueueing Users::TouchJob on reaction create
* Refactor Reactions::UpdateReactable job
* Fix observer spec
