Ensuring that your web pages are delivered to the user as quickly as possible, results in a great user experience. However, users spend more time interacting with the page than waiting for it to download. This makes the smoothness and responsiveness of the site even more critical. Janky page scrolls, disjointed animations or delayed visual cues in a page are just as bad as a site that takes time to load.
Most modern web browsers have tools that can help determine the various performance bottlenecks during typical user interactions. Excellent tutorials have also been written about performance workflows. Despite this, rapid development and deploy cycles make it hard to implement regular performance audits. Tools like [PageSpeed Insights](http://updates.html5rocks.com/201