Lab Data (Synthetic Monitoring)

Lab data is performance data collected in a controlled, repeatable environment using tools like Google Lighthouse or WebPageTest. The test is always run from the same location, on the same device profile, and with the same network speed. This consistency makes lab data excellent for debugging specific issues and for running automated checks to prevent performance regressions. However, it does not represent the varied and often slower conditions of real users, which is why Field Data is also essential.