Using R to detect fraud at 1 million transactions per second

In Joseph Sirosh's keynote presentation at the Data Science Summit on Monday, Wee Hyong Tok demonstrated using R in SQL Server 2016 to detect fraud in real-time credit card transactions at a rate of 1 million transactions per second. The demo (which starts at the 17:00 minute mark) used a gradient-boosted tree model to predict the probability of a credit card transaction being fraudulent, based on attributes like the charge amount and the country of origin. Then, a stored procedure in SQL Server 2016 was used to score transactions streaming into the database at a rate of 3.6 billion per hour. If you'd like to try this yourself, a step-by-step tutorial with code to implement the model and scoring is available here. Later in the keynote (starting at 25:00), John Salch, VP of Technology and Platforms at PROS describes using R to determine prices for airline tickets, hotel rooms, and laptops.