Browser & Web Performance · Junior · Question 22 of 75
What's the difference between lab data and field data?
- 1Lab data is collected from real users; field data is simulated
- 2They are the same data shown in different tools
- ✓Correct answer: Lab data comes from a controlled test (e.g. Lighthouse); field data comes from real users' devices and networks
Explanation
Lab tests are reproducible and good for debugging; field data (RUM, CrUX) shows what users actually experience. They often disagree.