The Rails Boot Process

on YouTube ↗39m

" summary

Explains exactly what files run and when: config/boot.rb calls Bundler.setup, config/application.rb loads railties then Bundler.require, the application class evaluates, config/environments/ runs last so its settings override application.rb, and Rails.application.initialize* runs the initializer groups. Rails exposes integration via Rails::Railtie and Rails::Engine, a vanilla app ships ~15 railties and ends up with about 120 initializers ordered by a topological sort; eager_load happens in production by default.

AI-written summary · about

" chapters (27)

1. 0:00Intro
2. 4:05Running Rails
3. 7:16Config Environment
4. 9:01Summary
5. 10:00Rails Ia
6. 11:45Rails Relatives
7. 13:14ActiveRecord
8. 14:23Action Dispatch
9. 15:26Rails Load
10. 18:04Rails Rate
11. 18:23Lazy Loading
12. 20:07Active Record
13. 21:35Raised Engine
14. 21:50RealTime Engine
15. 22:47Subclassing Engine
16. 24:02Initializer
17. 24:41Rails Engine
18. 27:50Rails Booster Groups
19. 29:09Bootstrap Block
20. 29:38Initializers
21. 29:51Finisher
22. 31:25After utilize
23. 31:44Loads of routes
24. 31:59Topological sort
25. 33:18Design it
26. 33:44Rails 124
27. 35:32The Summary

" related talks

• 41mRuby on Rails Hacking GuideAkira Matsuda · RailsConf 2014
• 43mThe Magic of RailsEileen M Uchitelle · Rails World 2023
• 28mDissecting RailsRatnadeep Deshmane · RubyConf India 2023
• 45mClass Reloading in Ruby on Rails: The Whole StoryXavier Noria · RailsConf 2014
• 38mAll you need is Rails (Engines): Compartmentalising your MonolithJulián Pinzón Eslava · RubyConf AU 2023
• 31mDemystifying the Ruby package ecosystemJenny Shen · Rails World 2023
• 34mRails: Still the Best Framework for BootstrappingAnothony Eden · ArrrrCamp 2013
• 40mBusting Performance Bottlenecks: Improving Boot Time by 60%Julian Nadeau · RubyKaigi 2017