Performance Score (PSI)
Google's PageSpeed Insights score directly influences your Core Web Vitals assessment, which is a confirmed Google ranking factor. SaaSalyst measures your mobile performance score using the Google PSI API, providing the same data that Google uses to evaluate your site's speed and user experience.
What SaaSalyst Checks
SaaSalyst calls the Google PageSpeed Insights API v5 with your URL, using mobile strategy. The API runs a Lighthouse audit and returns a performance score from 0-100. Scores above 90 pass, 50-89 trigger a warning, and below 50 fail. The PSI API timeout is 30 seconds to accommodate slow sites.
Why This Matters
Performance directly impacts user experience and search rankings. Google confirmed that Core Web Vitals (measured by PSI) are a ranking factor, meaning slow sites rank lower than fast ones for the same queries.
For SaaS products, performance also affects conversion rates. Studies consistently show that slower load times lead to higher bounce rates. A 1-second delay in page load can reduce conversions by 7%.
Mobile performance is especially critical because most initial product discovery happens on mobile devices, where network conditions and device capabilities are more constrained.
53%
Of mobile visits abandoned if page takes over 3 seconds to load
Google/SOASTA Research
100ms
Additional delay reduces conversion rates by up to 7%
Akamai
How to Fix It
- Run your URL through PageSpeed Insights (pagespeed.web.dev) to see specific recommendations for improvement.
- Focus on the three Core Web Vitals: Largest Contentful Paint (loading), Cumulative Layout Shift (visual stability), and Interaction to Next Paint (responsiveness).
- Common quick wins: optimize images (WebP format, lazy loading), minimize JavaScript bundles, enable compression, and use a CDN.
- For Next.js apps, use next/image for automatic image optimization and implement code splitting with dynamic imports.
Frequently Asked Questions
How does SaaSalyst measure performance?
SaaSalyst uses the Google PageSpeed Insights API v5, the same tool Google uses for Core Web Vitals assessment. It runs a Lighthouse audit on mobile and returns a score from 0-100.
What is a good PageSpeed Insights score?
SaaSalyst rates scores above 90 as passing (good), 50-89 as warning (needs improvement), and below 50 as failing (poor). Google considers 90+ as a 'good' performance score.
How does performance affect my Business Readiness Score?
SaaSalyst includes performance in the Performance category. A poor performance score lowers your overall Business Readiness Score because it affects user experience, SEO rankings, and conversion rates.
References & Official Sources
Official regulatory and standards sources relevant to the checks SaaSalyst runs on your site.
- Web Vitals Documentation· Google
- PageSpeed Insights· Google
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