| # | Name | Comments | Duration | Released | 
    
      | 411 | Performance Testing
          pro |  | 16 minutes | Mar 27, 2013 | 
    
      | 369 | Client-Side Performance
          pro |  | 14 minutes | Jul 24, 2012 | 
    
      | 22 | Eager Loading (revised) |  | 7 minutes | Mar 20, 2013 | 
    
      | 414 | Batch API Requests
          pro |  | 18 minutes | Apr 27, 2013 | 
    
      | 53 | Handling Exceptions (revised) |  | 11 minutes | Apr 20, 2013 | 
    
      | 399 | Autocomplete Search Terms
          pro |  | 17 minutes | Dec 31, 2012 | 
    
      | 368 | MiniProfiler |  | 9 minutes | Jul 24, 2012 | 
    
      | 343 | Full-Text Search in PostgreSQL
          pro |  | 16 minutes | Apr 17, 2012 | 
    
      | 383 | Uploading to Amazon S3
          pro |  | 14 minutes | Sep 26, 2012 | 
    
      | 169 | Dynamic Page Caching (revised) |  | 7 minutes | Feb 11, 2012 | 
    
      | 391 | Testing JavaScript with PhantomJS
          pro |  | 10 minutes | Nov 07, 2012 | 
    
      | 366 | Sidekiq |  | 10 minutes | Jul 18, 2012 | 
    
      | 282 | Upgrading to Rails 3.1 |  | 8 minutes | Sep 05, 2011 | 
    
      | 202 | Active Record Queries in Rails 3 |  | 10 minutes | Feb 22, 2010 | 
    
      | 14 | Performing Calculations on Models |  | 2 minutes | Apr 04, 2007 | 
    
      | 150 | Rails Metal |  | 9 minutes | Feb 23, 2009 | 
    
      | 171 | Delayed Job |  | 10 minutes | Jul 20, 2009 | 
    
      | 108 | named_scope |  | 11 minutes | May 19, 2008 | 
    
      | 98 | Request Profiling |  | 10 minutes | Mar 24, 2008 | 
    
      | 97 | Analyzing the Production Log |  | 5 minutes | Mar 17, 2008 | 
    
      | 23 | Counter Cache Column |  | 7 minutes | Apr 25, 2007 | 
    
      | 52 | Update through Checkboxes |  | 10 minutes | Jul 02, 2007 | 
    
      | 22 | Eager Loading |  | 4 minutes | Apr 23, 2007 | 
    
      | 1 | Caching with Instance Variables |  | 2 minutes | Mar 04, 2007 | 
    
      | 85 | YAML Configuration File |  | 7 minutes | Dec 23, 2007 |