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Web Performance Optimization & Lighthouse · Lesson

Analyzing Performance Data

Interpret RUM and synthetic monitoring data to identify trends, regressions, and areas for improvement in user experience.

Decoding Performance Data

Welcome! In this lesson, we'll dive into the art of analyzing the performance data collected by Real User Monitoring (RUM) and Synthetic Monitoring tools.

Understanding this data is crucial for identifying trends, pinpointing issues, and ultimately making your website faster for everyone.

Unpacking RUM Metrics

RUM tools gather data directly from your users' browsers. This includes a wealth of metrics like:

  • Page Load Time: Total time for a page to fully load.
  • Core Web Vitals: LCP, FID, CLS – key user experience metrics.
  • Resource Timings: How long specific images, scripts, or stylesheets take to load.
  • JavaScript Errors: Client-side errors impacting user experience.

RUM shows you what users actually experience.

All lessons in this course

  1. RUM vs. Synthetic Monitoring
  2. Implementing RUM Solutions
  3. Analyzing Performance Data
  4. Setting Up Performance Alerting
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