I thought you were being facetious! In case anyone else also thought that, turbofan is a real thing: " [1]

> Recently, Google engineers landed a new optimizing JavaScript compiler for V8, codenamed TurboFan. As the name implies, this is supposed to further improve JavaScript execution speed, likely to be better than its predecessor, Crankshaft. While TurboFan is still in its early stage, that doesn’t mean we can’t take a look at it.

I imagine that it has to get stable for v8 first before it is even considered, but that's exactly the example of potential "more performance" in io.js

[1] http://ariya.ofilabs.com/2014/08/javascript-and-v8-turbofan....