benchmark

To measure web performance regressions, this Skill uses a browser-based performance daemon to capture real-world timing data. It baselines page load metrics like LCP and FCP, then diffs current results against saved branches to identify regressions.

An end-to-end page performance audit captures TTFB, FCP, LCP, DOM timings, and total transfer size. These web vitals provide a comprehensive resource breakdown for evaluating real-world page load efficiency.

To compare performance baselines and analyze trends, you save baseline capture data and generate a detailed report. This process diffs current timing metrics against historical baselines to guide optimization decisions in PR reviews.

Yes, you can benchmark live pages and PRs without additional dependencies because the Skill operates using the built-in browser performance API. It applies page selection and baseline capture directly to measure real-world timing data.

The best way to track web performance trends across feature branches is to capture baseline timing data for each branch and run a trend analysis. This compares navigation timings and resource breakdowns to highlight regressions.