benchmark

Detect performance regressions across PRs by collecting navigation timing and resource metrics from a URL and comparing them against stored baselines. It targets pages and bundles to produce human-readable diff reports.

Track Core Web Vitals trends over time by establishing baselines for page load times and resource sizes, then using trend mode to focus on historical data comparisons across pull requests.

Set up a performance baseline for page load times by running the benchmark command with a target URL and the baseline flag. It collects navigation timing metrics to establish your initial reference point.

Yes, you need a browse daemon to collect web vitals metrics. The end-to-end workflow also requires baseline storage and a comparison pipeline to produce human-readable performance reports.

Yes, you can compare bundle sizes before and after a PR. The tool supports diff mode to focus on changed data, comparing resource sizes and Core Web Vitals against previously captured baselines.

Use baseline mode to establish initial page load and resource size references. Use diff mode to compare current metrics against those baselines on every PR, or trend mode to focus on historical data.