View: 
Categories
- Active Record
- Active Resource
- Active Support
- Administration
- Ajax
- APIs
- Authentication
- Authorization
- Background Jobs
- Caching
- Code Walkthrough
- Controllers
- Debugging
- Deployment
- eCommerce
- Forms
- Mailing
- Models
- Performance
- Plugins
- Production
- Rack
- Rails 2.0
- Rails 2.1
- Rails 2.2
- Rails 2.3
- Rails 3.0
- Rails 3.1
- Rails 3.2
- Rails 4.0
- Refactoring
- Routing
- Search
- Security
- Testing
- Tools
- Views
Applied Filters:
performance x
Counter Cache Column
If you need to display the record count for a has_many association, you can improve performance by caching that number in a column.
(7 minutes)
Update through Checkboxes
See how to select multiple items using checkboxes and perform an action on the selected items in this episode.
(10 minutes)
Eager Loading
One way to improve performance is to cut down on the number of SQL queries. You can do this through eager loading. Learn all about it in this episode!
(4 minutes)
Caching with Instance Variables
Learn a quick way to improve performance. Just store the end result of an expensive command in an instance variable!
(2 minutes)
YAML Configuration File
Application configuration shouldn't be spread throughout your code base. Instead a much better place to put it is an external YAML file. See how to do that in this episode.
(7 minutes)