Introducing RebelMouse Performance Monitoring

Adam Taylor
Fri, 24 Feb 2023 18:53:00 +0000
Core web vitals

Core Web Vitals (CWV) are a critical element for a successful web site. The RebelMouse CMS is built around the idea that your site should pass CWV without needing a huge lift from a development team. In fact, many of the fastest sites on the web, and best performing at CWV, are powered by RebelMouse.

One very tricky aspect to achieving success at CWV though, is built into the standard testing tools, namely Google’s PageSpeed Insights test. PageSpeed Insights gives you a very nice snapshot into your site’s performance, but it’s designed to show a 28-day average of your performance. This means that whenever you make a big performance update to your site, it’s going to be nearly a month until you know if your update helped or hurt your site.

At RebelMouse, we believe that you shouldn’t have to wait to know what’s happening to your site. That’s why we've launched RebelMouse Performance Monitoring. With this powerful tool, you can see your CWV performance in real time, and measure your performance against your traffic.

What Are Core Web Vitals?

Here's a quick recap of the metrics that make up Google's Core Web Vitals:

Largest Contentful Paint (LCP): A website's LCP is the time it takes to load the main content on a page. Google wants LCP to happen within 2.5 seconds of when a page first starts loading.

First Input Delay (FID): This metric quantifies a user's experience when trying to interact with unresponsive pages. You want your FID score to be low to prove the usability of your site. According to Google, pages should haven an FID of less than 100 milliseconds.

Cumulative Layout Shift (CLS): CLS determines how often your users experience unexpected layout shifts or changes on a page. To ensure visual stability, you want your CLS score to be low. Google recommends that pages maintain a CLS score of less than 0.1.

The other existing performance-based search signals are:

First Contentful Paint (FCP): This metric measures the time from when the page starts loading to when any part of the page's content is rendered on the screen. For this metric, "content" refers to text, images (including background images),