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# Is Your Site Slow? Measure Before You Buy a More Powerful ServerEN

2026-09-20Alessandro Corbelli~5 min

A slow site loses visitors, sales and ranking. Why a more powerful server almost never fixes it, which two numbers to check for free, and the real causes of slowness.

core-web-vitals web-performance seo performance caching

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# TTFB: What Time To First Byte Is and Why It Matters for Site PerformanceEN

2026-06-28Alessandro Corbelli~6 min read min

What TTFB (Time To First Byte) is, why it affects user experience and SEO, what it depends on, and the general levers that help reduce it.

core-web-vitals web-performance seo ttfb performance caching

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# INP Replaces FID in Core Web Vitals: What It Measures and What to WatchEN

2024-03-12Alessandro Corbelli~7 min read min

As of March 12, 2024, Interaction to Next Paint (INP) replaces First Input Delay among Google's Core Web Vitals. What it measures, the good threshold under 200 ms, and why it matters for user…

inp core-web-vitals web-performance seo fid

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