Jason questions

• Why is this SQL generating a temporary table and running so slow?
• What are the advantages of using Passenger over a Mongrel Cluster?
• How can I optimize images uploaded using Paperclip & Rails?
• How to write a script (in Ruby / Rails) that will regenerate all of the thumbnails for my new paperclip styles?
• Short Ruby Case Statement using include? Will Not Work
• How to use Cloudfront with basic auth?
• Rails 3 & Encrypted Strings Gem - getting OpenSSL::Cipher::CipherError: bad decrypt error
• Is Varnishd the right caching solution to use with Rails?
• What is the advantage of creating an enumerable object using to_enum in Ruby?
• How to redirect a user after registration when using Devise?

Jason answers