{
    let MY_CONSTANT = 8;
    let result = 0;
    function measure() {
        let i = 0;
        for (; i < 100_000_000; i++) {
            result += i + MY_CONSTANT;
        }
    }

    const start = performance.now();
    measure();
    const end = performance.now();
    console.table(
        '%c[LET]', 'color: green', `time: ${end - start}`
    );
}

{
    var MY_CONSTANT = 8;
    var result = 0;
    function measure() {
        var i = 0;
        for (; i < 100_000_000; i++) {
            result += i + MY_CONSTANT;
        }
    }

    const start = performance.now();
    measure();
    const end = performance.now();
    console.table(
        '%c[VAR]', 'color: orange', `time: ${end - start}`
    );
}

import { performance } from "perf_hooks";

let myConstant = 0;
let result = 0;

function l() {
    let i = 0;
    for (i = 0; i < 100_000_000; i++) {
        result += i + myConstant;
    }
}

let startPerf = performance.now();
l();
let endPerf = performance.now();
console.log(result, endPerf - startPerf);

import { performance } from "perf_hooks";

var myConstant = 0;
var result = 0;

function v() {
    var i = 0;
    for (i = 0; i < 100000000; i++) {
        result += i + myConstant;
    }
}

var startPerf = performance.now();
v();
var endPerf = performance.now();
console.log(result, endPerf - startPerf);