---
title: "Site performance with Lighthouse"
url: https://perrotta.dev/2024/12/site-performance-with-lighthouse/
last_updated: 2026-02-16
---


Lighthouse can be used to assess overall site performance. There is a myriad of
ways to run it:

- Google (cloud): https://pagespeed.web.dev/
- Chrome DevTools (locally): Lighthouse tab
- CLI tool: https://github.com/GoogleChrome/lighthouse
- Github Actions: https://github.com/GoogleChrome/lighthouse-ci

It has four metrics scored from 0 to 100 each:

- performance
- accessibility
- best practices
- SEO

I ran it against [my blog](https://pagespeed.web.dev/analysis/https-perrotta-dev/f7pfqerk0f?form_factor=mobile).

My score was 100 / 83 / 96 / 100, respectively, which is quite good. It's not
unexpected either, because I am running a static website.

It offered me a couple of suggestions:

> — Image elements do not have explicit width and height
> — Serve images in next-gen formats Potential savings of 18 KiB
> — Serve static assets with an efficient cache policy 2 resources found
> — Properly size images Potential savings of 23 KiB

I addressed most of the suggestions.

Cloudflare also has a similar scan: [Cloudflare
Radar](https://radar.cloudflare.com/scan/b274b6c2-1015-4907-aeca-30b7be8d1769/summary).