The next big thing from Facebook (makers of react). It optimizes code execution by unrolling loops and whatnot. Examples in the link as well as other links to source etc.
Interesting,
The compiled code looks remarkably familiar for a self-taught coder. 
(I already coded that way, and now that I know how to code in a somewhat proper manner, a program will decode my advanced code - to the spagetti code I wrote years ago… )