JSFiddle - React, Tailwind, and code Playground

JavaScript

function t(){return new Date().getTime()}

var t1 = t();
var count = 5000 * 1000;
for(var i = 0; i < count; i++){
    a();
}
console.log(t() - t1);

function a(){
    var i = b();  
}
function b(){return 'test';}