Response time is the total elapsed time between a client sending a request and receiving the complete response. It encompasses DNS resolution, TCP connection establishment, TLS handshake (for HTTPS), server processing time, and data transfer time. It is the most direct measure of what users actually experience.
Response time is typically broken down into components for diagnosis: DNS lookup time, connection time, TLS negotiation time, time to first byte (TTFB, server processing), and content transfer time. Understanding which component is slow helps target optimization efforts — a slow TTFB suggests server-side issues, while slow DNS lookup suggests DNS infrastructure problems.
Response time monitoring should be performed from multiple geographic locations to understand the experience of users worldwide. A service may respond in 200ms from a nearby data center but 2,000ms from another continent. Hyperping monitors response time from 15+ global locations and tracks trends over time to detect performance degradation before it impacts user satisfaction.
