TTFB (Time To First Byte)
Sitecheck Team
The time it takes for the first byte of a server response to reach the browser.
TTFB (Time To First Byte) measures how long it takes from a request being made to the first byte of the response arriving. It includes network latency, server processing time, and any CDN edge delays.
Why it matters: High TTFB slows perceived speed and can hurt LCP and overall user experience.
Quick tips:
- Use a CDN to reduce network latency for global users.
- Cache dynamic responses where possible.
- Optimize database queries and backend render time.
See also: Core Web Vitals, LCP, CDN.