Real User Monitoring (RUM) collects performance data from actual visitors to your website. Unlike synthetic monitoring, RUM captures real-world conditions including various devices, browsers, network speeds, and geographic locations.
Benefits of RUM
- See how real users experience your site
- Capture data from all device types and browsers
- Understand performance across geographic regions
- Identify issues that only appear in production
- Track Core Web Vitals from the field
RUM vs Synthetic Monitoring
| Aspect | RUM | Synthetic | |--------|-----|-----------| | Data source | Real users | Simulated tests | | Conditions | Variable | Controlled | | Coverage | All pages visited | Tested pages only | | When | Continuous | Scheduled |
What RUM measures
- Page load times
- Core Web Vitals (LCP, INP, CLS)
- JavaScript errors
- User interactions
- Geographic and device distribution
How VitalSentinel handles this
VitalSentinel is your website's revenue insurance for real-world performance. RUM monitoring captures Core Web Vitals from every actual visitor, broken down by page, device, country, and browser, with a lightweight script that does not slow your site down. You find out in hours, not weeks, when a slow LCP or jumpy CLS starts pushing real users (and rankings) away.
Related Terms
Chrome User Experience Report (CrUX)
A public dataset of real user experience data from millions of websites, collected from Chrome users who have opted in to usage statistic reporting.
Core Web Vitals
A set of three metrics defined by Google that measure the loading performance, interactivity, and visual stability of a web page.
Field Data
Performance metrics collected from real users in production environments, as opposed to lab data collected in controlled testing conditions.
Synthetic Monitoring
A type of performance monitoring that uses automated scripts to simulate user interactions and measure performance in controlled conditions.