title: Bulk Insert records into Active Record table
body: <p>I found that my <code>Model.create!</code> statements were taking a very long time to run when I added a large number of records at once.  Looked at <a href="https://github.com/zdennis/activerecord-import/wiki">ActiveRecord-Import</a> but it didn't work with an array of hashes (which is what I have and which I think is pretty common).  How can I improve the performance?</p>