The JavaScript ecosystem is evolving in several promising ways. There have been mainstream standards advancements like the recent approval of

ECMAScript 2015

, as well as early-stage experiments like

Strong Mode

, to name a few. Balancing the needs of these new directions demands a flexible

just-in-time compiler

, and we've been hard at work on a brand new compiler for V8, codenamed "TurboFan." Since Chrome 41, TurboFan has been enabled for certain types of code, speeding up traditional content as well as improving performance for new language features.