All providers — TTFB

Time to first byte is the key to fast page loading

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Scenario
Aggregation
Period
Dynamics of average connection time
Average connection time for the period

What is TTFB and why measure it?

TTFB (Time To First Byte) — the time from sending a request to receiving the first byte of the response from the server. It includes RTT, the TLS handshake, and request processing time on the CDN side. TTFB directly affects:

  • page load speed as assessed by Google (Core Web Vitals)
  • website rankings in search results
  • the user's perception of site speed

Google recommends keeping TTFB below 800 ms. Values above this threshold negatively impact search rankings.

What do the TTFB charts show?

01

Average connection time chart (HTTP/HTTPS) — the difference between HTTP and HTTPS reflects the TLS handshake overhead. A large gap between the lines indicates a suboptimal SSL configuration on the provider's edge servers.

02

Cities with high TTFB — locations where the CDN server processes requests slowly. May indicate insufficient capacity at regional nodes or frequent cache misses.

03

Providers with high TTFB — a comparative response speed ranking. Low TTFB correlates with better search rankings and higher conversion rates.