Server response time (TTFB)
TTFB (Time To First Byte) measures the time between the browser requesting the page and the first byte of response arriving. It's like measu…
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How it works
How TheSiteFuse checks "Server response time (TTFB)"
TTFB (Time To First Byte) measures the time between the browser requesting the page and the first byte of response arriving. It's like measuring how long a server takes to "pick up the phone".
Why it matters
Real-world impact of "Server response time (TTFB)"
A TTFB above 500 ms slows down the entire page load. It's also a negative signal for Google rankings. A fast TTFB (< 200 ms) is the foundation of a performant site.
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