Posthaste

Optimize code using static analysis

Proof of Concept

Install

npm i -g posthaste

Usage

Mark areas of code that you wish to optimize with // posthaste optimize:

var x = 1

// posthaste optimize:
var obj = {
  a: x,
  b: 2
}

console.log(obj)

posthaste input.js > output.js

Optimizations

Currently the only supported optimization is to convert object literals into constructed objects.

This has two advantages

1. For a frequently queried or mutated object it enables v8 hidden classes optimization
2. When profiling, objects are identified by constructor - object literals all come under the same type Object which tends to swamp any indication of a memory leak.