Introduction

JavaScript has become as crucial to many websites as the HTML it’s written in. The language may be regarded as the Toby Flenderson of programming languages by many developers, but without it, the functionality of so many of our favorite websites would crumble. And as the saying goes, with great power, comes great responsibility. How performant JavaScript is on a page plays a large part in how good of an experience a user has, and we’re in an age when milliseconds matter. This is why a performance monitoring tool was deemed necessary. …