Server Web Performance & TTFB Latency Auditor
Measure server-side web performance metrics: DNS lookup, TCP handshake, TLS negotiation, Time to First Byte (TTFB), content download time, HTTP/2 & HTTP/3 protocol support, and Gzip/Brotli compression ratios.
Overall Performance
A
Score: 95/100
HTTP/2 negotiated
Compression & Protocol Summary
Gzip Compression
Supported
Savings: -
Compressed: - / Uncompressed: -
Brotli Compression
Supported
Savings: -
Compressed: - / Uncompressed: -
Connection Latency Waterfall
HTTP Security & Caching Headers Audit
| Header | Status | Value / Recommendation |
|---|
Raw HTTP Response Headers
Web Server Latency Breakdown & Core Web Vitals
Server web speed measures the latency timeline required for a client browser to initiate connection and receive the first byte of HTTP payload.
Latency Timeline Phases
- DNS Lookup: Time required to resolve hostname to target IP address via DNS servers.
- TCP Handshake: SYN/ACK 3-way handshake round-trip time (RTT).
- TLS Handshake: Cryptographic cipher negotiation and certificate validation (TLS 1.3 requires 1-RTT).
- Time to First Byte (TTFB): Server processing time before sending initial HTTP response bytes. Target TTFB is under 200ms.