Scan Module For: Performance

See how fast your site really feels. The Performance module uses Google's Lighthouse engine to measure Core Web Vitals and other performance metrics on every page, on both desktop and mobile. You'll see clear scores, find what's slowing pages down, and get specific recommendations for improving them.

Performance Scan Module Details

  • Full-site Performance scan

    Most performance tools, including Google's PageSpeed Insights, test one page at a time. BetaSweep runs Lighthouse across your entire site, a single page, or a custom list of URLs—all in one scan. Rescans are grouped with the original so you can track changes over time. For larger sites, we recommend scanning one example from each page type, since pages built from the same template tend to produce similar results. This can significantly reduce scan time.

    Because BetaSweep runs on your computer, it can test sites that online tools can't reach. Run Lighthouse audits on localhost, staging environments, and sites behind Basic Auth passwords or a WAF (web application firewall). Credentials and tokens are passed to Lighthouse automatically.

  • Measure key performance metrics

    Powered by Lighthouse, Google's open-source engine behind PageSpeed Insights and Chrome DevTools. BetaSweep measures Lighthouse performance metrics including LCP, FCP, TTI, TBT, CLS, and Speed Index—the signals behind Google's Core Web Vitals. Together, these metrics show how quickly each page loads, how soon it responds, and how stable it looks while loading.

  • Test desktop and mobile separately

    Get separate performance results for desktop and mobile. Mobile performance can be very different because phones may have less processing power and slower network connections. Testing both gives you a more complete picture of how your site performs across devices.

  • Simulate real network conditions

    Choose between no throttling, simulated 4G, or simulated slow 3G. Throttling simulates slower network connections and devices, helping you see how your site performs when conditions aren't ideal. Desktop and mobile settings can be configured independently.

  • Test each page in isolation

    Every page runs in its own isolated process, so one slow or problematic page doesn't affect the results of other pages. This helps produce more consistent and repeatable results across your site.

  • Download and Share Actionable Reporting

    Score every page from 0 to 100

    Each page gets a clear Lighthouse performance score: Poor (under 50), Fair (50–89), or Good (90+). Compare desktop and mobile results and track improvements over time with rescans.

    Get actionable recommendations

    Each page includes Lighthouse recommendations with specific resources, file sizes, and potential savings. See which images, scripts, or CSS files are slowing things down and what you can do to improve them.

    Identify incomplete audits

    When Lighthouse can't fully load a page, BetaSweep labels it as an incomplete audit instead of showing a misleading zero score. You'll know which pages need a closer look.