If you write your javascript in a way that is easy for V8 to JIT, then I think you'll benefit most from progressive enhancements made in the underlying engine.

If you write your javascript in a way that is easy for V8 to JIT, then I think you'll benefit most from progressive enhancements made in the underlying engine. There's a lot of talks and articles on V8 performance, for example: http://mrale.ph/v8/resources.html http://mrale.ph/v8/resources.html Surprisingly, very boring, predictably shaped prototypey classes written in the "hidden classes" style they prescribe will JIT compile amazingly well. I think a lot of the fancy uses of JavaScript to roll types with mixins and traits or simply to sidestep needing the 'new' keyword to instantiate objects miss out on lots of performance benefits on V8. Honestly, where does all the hate for 'new' come from? Prototypey classes work fine once you understand how to roll them/extend them, and 'new' is a real keyword in the language, what's to hate?