console.time("My Descriptive Title");

​

doSomething(); // <--- the function that you want to time

​

console.timeEnd("My Descriptive Title"); // Argument has to match

​

// My Descriptive Title: 8917.283ms

console.time('Time') // start your timer

doShit();

console.timeEnd('Time') // end the timer, make sure argument matches

var t0 = performance.now();

​

doSomething();   // <---- The function you're measuring time for 

​

var t1 = performance.now();

console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.");

app.use((req, res, next) => {

    let start = Date.now();

    res.on('finish',async () => {

        let timeTaken = Date.now() - start;

        console.log("Total time taken : " + timeTaken + " milliseconds");

    });

    next();

});

const { JSDOM } = require("jsdom");

const { window } = new JSDOM();

var start = window.performance.now();

// task starts

for (var i = 0; i < 100000000;i++);

// task ends

var end = window.performance.now();

console.log(`Execution time: ${end - start} ms`);