The Free Lunch Is Over: A Fundamental Turn Toward Concurrency in Software The Free Lunch Is Over A Fundamental Turn Toward Concurrency in SoftwareBy Herb Sutter The biggest sea change in software development since the OO revolution is knocking at the door, and its name is Concurrency. This article appeared in Dr. Dobb's Journal, 30(3), March 2005. A much briefer version under the title "The Concur