Evaluate server response speed, TLS handshake negotiation, and first-byte latency from North America, Europe, and Asia-Pacific edge probes. Free guest runs are delivered live via Socket.IO with failsafe recovery.
Time to First Byte (TTFB) measures the duration from the user making an HTTP request to the browser receiving the first byte of data from the origin server. A low TTFB ensures that the browser can start parsing HTML and requesting critical render assets immediately.
< 200 ms
Optimal edge or cached origin response
200 ms - 600 ms
Noticeable origin processing or routing delay
> 600 ms
Server bottleneck, blocking LCP milestone
TTFB is the total time elapsed between the client sending an HTTP request and receiving the first byte of the response. It combines DNS resolution, TCP connection setup, TLS negotiation, and origin server processing time. A fast TTFB is the prerequisite for fast page rendering.
According to Google Core Web Vitals guidelines, a TTFB under 200 ms is considered good. A score between 200 ms and 600 ms needs improvement, while anything above 600 ms is considered poor and likely degrades Core Web Vitals.
MonitorMyHost dispatches concurrent diagnostic requests from autonomous probe nodes in North America, Europe, and Asia. Each probe measures the raw network round-trip and server response time without client-side caching interference.
Key optimizations include enabling full-page edge caching via a CDN, upgrading hosting infrastructure, optimizing slow backend database queries, enabling HTTP/3 and TLS 1.3 session resumption, and reducing origin application overhead.
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