Core Concepts Wiki Entry

Time to First Byte (TTFB)

The time from a request being made to the first byte of response arriving.

TTFB reflects server processing speed, network latency and CDN efficiency. While not a Core Web Vital, TTFB significantly influences LCP and overall perceived speed. Good TTFB is under 800ms; poor is over 1.8 seconds. Wix's global CDN and infrastructure typically deliver strong TTFB without site owner configuration.

Related Entries

Core Web Vitals

Google's page experience metrics measuring loading, interactivity and stability.

Largest Contentful Paint (LCP)

A Core Web Vital measuring how long the largest visible element takes to render.

CDN (Content Delivery Network)

Distributed servers that cache and deliver content from locations near users.

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