kc123 writes "The latest version of Chrome includes improvements in JavaScript compilation, according to the Chromium blog. Historically, Chrome compiled JavaScript on the main thread, where it could interfere with the performance of the JavaScript application. For large pieces of code this could become a nuisance, and in complex applications like games it could even lead to stuttering and dropped frames. In the latest Chrome Beta they've enabled concurrent compilation, which offloads a large part of the optimizing compilation phase to a background thread. The result is that JavaScript applications remain responsive and performance gets a boost."