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Week 6

Avatar for Ben Woodall Ben Woodall
May 07, 2015
Programming
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44

Week 6

Week 6 Slides for UW Advanced Rails

Avatar for Ben Woodall

Ben Woodall

May 07, 2015
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Transcript

  1. Questions from Week 5? 1

  2. Week 6: Performance and Optimization Spring 2015 2

  3. Why do we care? No one wants a slow website!

    Always Be Iterating! 3

  4. Places to Check Caching ActiveRecord Optimization Gems 4

  5. What is caching? 5

  6. What is caching? Storing data in a single place to

    avoid unneeded requests 6

  7. What is caching? There are only two hard things in

    Computer Science: cache invalidation and naming things. -- Phil Karlton 7

  8. Fragment Caching 8 config/environments/development.rb

  9. Fragment Caching 9 app/views/links/show.html.erb

  10. Fragment Caching 10 app/views/links/show.html.erb

  11. Fragment Caching 11 app/views/dashboards/all.json.jbuilder

  12. Optimizing with Active Record Includes Indexes 12

  13. Includes Active Record ensures that all of the specified associations

    are loaded using the minimum possible number of queries. 13

  14. Indexing A database index is a data structure that improves

    the speed of operations on a database table 14

  15. Third Party Help - Gems 15

  16. Third Party Help - Gems rack-mini-profiler bullet brakeman rails_best_practices rubocop

    rubycritic 16

  17. rack-mini-profiler 17 Gemfile config/initializers/rack_profiler.rb

  18. rack-mini-profiler 18 Gemfile

  19. bullet 19 Gemfile config/initializers/bullet.rb

  20. bullet 20 app/controllers/dashboards_controller.rb

  21. bullet 21

  22. brakeman 22 Gemfile

  23. rails_best_practices 23 Gemfile

  24. rubocop 24 Gemfile

  25. rubycritic 25 Gemfile