> For the complete documentation index, see [llms.txt](https://docs.pylenium.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pylenium.io/driver-commands/web-performance.md).

# Web Performance

- [Performance API](https://docs.pylenium.io/driver-commands/web-performance/performance-api.md): Pylenium's custom performance API to capture different metrics.
- [CDP Performance](https://docs.pylenium.io/driver-commands/web-performance/cdp-performance.md): Chrome DevTools Protocol (CDP) Performance API to capture metrics.