benchmark

Automate performance regression detection by comparing load times, Core Web Vitals, and resource sizes before and after changes using Selenium and Lighthouse. This establishes baselines and identifies regressions continuously over time.

Comparing Core Web Vitals before and after a deployment requires establishing a performance baseline and running automated browser tests. This ensures metrics like page load time do not increase beyond acceptable thresholds.

Selenium and Lighthouse are required dependencies to track web page load times over time. Selenium provides browser automation while Lighthouse captures performance testing metrics for continuous monitoring workflows.

Monitoring resource sizes and performance trends on every pull request is possible by integrating automated benchmarking scripts. This tracks web development metrics continuously to detect regressions before merging.

Regression detection is needed in web performance optimization workflows to prevent untracked code changes from degrading load times. It establishes baselines and compares metrics to ensure optimal performance over time.

Continuous performance monitoring with Lighthouse requires Selenium for browser automation and focuses solely on web page metrics. It detects regressions in load times and Core Web Vitals but does not profile backend server performance.