Getting Started

Treo helps you understand and improve web performance using two data sources: real-user data from the Chrome UX Report (CrUX) and synthetic audits from Lighthouse. This guide will get you from zero to actionable insights in minutes.

Check any website in seconds

Go to Site Speed and type in a domain or URL. You'll instantly see how real Chrome users experience that website — no account, no setup, no tracking scripts.

Site Speed search with a domain entered and CrUX results displayed

This is the fastest way to benchmark your site, audit a competitor, or verify a performance fix. Try it with your own domain to see where you stand.

Tip: CrUX data covers most websites with meaningful traffic. If you see "No CrUX Data", the site doesn't have enough Chrome visitors for Google to include it in the dataset.

Set up ongoing monitoring

Once you've seen your baseline, create a free account to start tracking changes over time.

Save your domains

Save up to 5 domains in Site Speed to build a personal dashboard. Each saved site tracks CrUX metrics automatically — check back anytime to see how performance is trending.

You can add specific URLs to each site using manual entry, a sitemap, or Scan URLs Lite for automatic page discovery.

Upgrade for deeper CrUX insights

When you need more capacity or longer history, Sites (available on paid plans) unlock:

Hundreds of domains and thousands of tracked URLs.
Up to 5 years of historical CrUX data.
Geographic performance heatmaps by country.
LCP subparts analysis showing exactly where loading time is spent.
Site groups to organize domains by project, client, or team.

Add Lighthouse audits

Pages complement CrUX with synthetic Lighthouse audits that run on a schedule — every 1 or 8 hours. Use them when you need:

Controlled testing — consistent network and device conditions, unaffected by user variability.
Detailed diagnostics — specific recommendations for what to fix.
Non-CrUX metrics — Accessibility, Best Practices, and SEO scores.
Fast feedback — detect regressions within hours, not the 28-day window CrUX requires.

Identify what to fix first

Both Sites and Pages let you sort by any metric. This makes it easy to find the worst-performing domains or pages across your portfolio:

Sort by LCP to find the slowest-loading pages.
Sort by CLS to find pages with layout shift issues.
Filter by device to check if mobile performance differs from desktop.
Filter by country (in Sites) to spot regional slowdowns.

Tip: Start with Core Web Vitals — LCP, INP, and CLS. These are the metrics Google uses for search ranking, and they directly reflect what your users experience.

Understand the two data sources

Treo combines two complementary perspectives on performance:

| | CrUX (Sites) | Lighthouse (Pages) | | -------------------- | ------------------------------------ | -------------------------------------- | | Data source | Real Chrome users | Synthetic audit | | Update frequency | 28-day rolling window | Every 1–8 hours | | Best for | Understanding actual user experience | Catching regressions, debugging issues | | Metrics | LCP, INP, CLS, TTFB, FCP | LCP, TBT, CLS, FCP, SI, TTI + scores | | Requires traffic | Yes (enough Chrome users) | No (runs on demand) |

Use CrUX to understand what users actually experience. Use Lighthouse to proactively catch and diagnose issues before they affect users.