measuring different execution time in node js

timing.js

const {performance} = require('perf_hooks');

// using hrtime API
const hrBefore = process.hrtime();

setTimeout(function () {

    const hrAfter = process.hrtime(hrBefore);

    console.log(`Using hrtime ${hrAfter[0] * 1e3 + hrAfter[1] / 1e6}ms`);
}, 0);

// using the hrtimebigint API

const hrBigBefore = process.hrtime.bigint();
setTimeout(function () {

    const diff = process.hrtime.bigint() - hrBigBefore;
    console.log(`Using hrtime bigint ${Number(diff) / 1e6}ms`);
}, 0);

//using the performance API
const perBefore = performance.now();

setTimeout(function () {

    const diff = performance.now() - perBefore;

    console.log(`Using perf hooks ${diff}ms`);
}, 0);

// using the console time API
console.time('Using timer ');

setTimeout(function () {

    console.timeEnd('Using timer ');
}, 0);

How about process.hrtime.bigint() ?

How about process.hrtime.bigint() ?

Yes! We can also use that if you care about the execution time in BigInt.

Also, there are some difference between process.hrtime() and process.hrtime.bigint() :-

• process.hrtime() is the legacy version of process.hrtime.bigint().

• process.hrtime.bigint() doesn't accept any argument

• process.hrtime() give time in [seconds, nanoseconds] while process.hrtime.bigint() in nanoseconds.