The infamous Oscar selfie of Ellen and other celebs broke a record of 2 million retweets before midnight, March 2, and Twitter came crashing down for a record 20 minutes.  And this despite the fact that Twitter built their own Load Testing tool, IAGO in 2012.  So why did Twitter build its own tool and what does that have to do with your decision to use homegrown versus vendor load testing tools? Read on for the answer.