JSFiddle - React, Tailwind, and code Playground

JavaScript

// Open the terminal

let external = (new Date()).getTime();
let blob = new Blob([`
  let internal = new Date();
  console.log("Creation:", internal - ${external} + 'ms');
`], {"type": "text\/plain"});
let file = URL.createObjectURL(blob);
let ww = new Worker(file);