Is a great Google Lighthouse score that important? How does Real User Monitoring metrics provide insights into website performance of users? Find out in this episode when Scott Moore interviews Erwin Hofman of RUMVision.
We’ve all been there. You run a Google Lighthouse test, eagerly awaiting that perfect 100 score. But is chasing that elusive number really the key to a fast, user-friendly website? The answer might surprise you.
The Limitations of Lab Data
While tools like Google Lighthouse provide valuable insights, they only tell part of the story. These synthetic tests simulate loading conditions, but they don’t capture the diverse real-world experiences of your actual users. A perfect Lighthouse score doesn’t always translate to a perfect user experience.
Enter Real User Monitoring: Your Users’ Perspective
This is where Real User Monitoring shines. RUM captures performance data from real visitors interacting with your website. It reflects the true diversity of devices, network conditions, and locations your audience uses. For stakeholders, this field data paints a much clearer picture of the actual user experience.
The Nuances RUM Uncovers
Real User Monitoring tools track numerous dimensions, revealing insights such as:
- Differences between new and returning visitors
- Performance impact of marketing campaigns
- Device-specific issues
- Geographical variations in load times
This granular data empowers teams to identify real bottlenecks and prioritize optimization efforts effectively.
Beyond the Score: Practical Optimization Tips
Here are some common pitfalls to avoid:
- Inefficient critical CSS implementation
- Over-optimization of assets
- Using
@import
in CSS - Suboptimal A/B testing placement
For A/B testing, place the hiding snippet at the very beginning of the <head>
to minimize visual flicker.
Getting Started with Real User Monitoring
Implementing RUM is often as simple as adding a JavaScript snippet to your site, similar to installing analytics tools. This provides immediate insights into your actual users’ experiences.
Context is King
Website performance isn’t just about a perfect score; it’s about delivering a fast, seamless experience to your users. Real User Monitoring provides the crucial context needed to understand your site’s performance in the real world.
By combining insights from lab data and RUM, you can move beyond chasing scores and focus on what truly matters: creating an exceptional user experience that drives results.
Check out this other episode about Real User Monitoring as well.
Show Notes
GUEST: Erwin Hofman
LINKEDIN PROFILE: https://www.linkedin.com/in/erwinhofman/
Website: https://www.rumvision.com/
Erwin Hofman: https://www.erwinhofman.com/
Example data


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