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2 documents tagged with “TTFB”

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TTFB (Time To First Byte) is the metric that tells you how fast your server really is. It measures the time from the browser sending a request to the moment it receives the first byte of HTML. We recommend under 0.5 seconds; Google accepts up to 0.8 s. The slower the TTFB, the slower the LCP and the worse the crawl budget for SEO.

At PageSpeed.ONE we track TTFB in every synthetic test and in the CrUX data from real users. The articles below cover what slows TTFB down (a sluggish backend, a distant server, missing cache) and how to bring the number under the recommended thresholds.

Speed Optimization: How Can the Backend Help?

The backend plays a crucial role in website speed optimization, as proper code and server-side optimization can eliminate delays often caused during request processing and content delivery.

Time To First Byte (TTFB)

TTFB reflects the speed of the server (or infrastructure), the server-side application, and also the network speed between the server and the user’s browser.

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