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Cache Digests
The cache_digests gem (also included in Rails 4) will automatically add a digest to the fragment cache key based on the template. If a template changes the cache will auto-expire. But watch out for the gotchas!
(7 minutes)
Dynamic Page Caching
Use JavaScript to allow dynamic content in a page cache. In this episode I show you how to insert the user-specific content into a page through JavaScript.
(11 minutes)
Bullet
Bullet will notify you of database queries that can potentially be improved through eager loading or counter cache column. A variety of notification alerts are supported.
(6 minutes)
Touch and Cache
Rails 2.3.3 brings us a new feature called "touch". See how to use this to auto-expire associated caches in this episode.
(6 minutes)
Page Caching
Page caching is an efficient way to cache stateless content. In this episode I will show you how to cache the dynamic javascript we created last week.
(6 minutes)
Action Caching
Action caching behaves much like page caching except it processes the controller filters. You can also make it conditional as seen in this episode.
(7 minutes)
Fragment Caching
Sometimes you only want to cache a section of a page instead of the entire page. Fragment caching is the answer as shown in this episode.
(6 minutes)
MiniProfiler
MiniProfiler allows you to see the speed of a request conveniently on the page. It also shows the SQL queries performed and allows you to profile a specific block of code.
(9 minutes)
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)
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)