Round Trip Time (rtt) Glossary Definition

Round Trip Time (rtt) is a Web performance concept used to improve loading behavior, rendering speed, responsiveness, efficiency, or perceived user experience.

Round-Trip Time is a Network performance concept used to measure, prioritize, or troubleshoot the behavior of traffic and services.

Front-end developers and operations teams use this concept when diagnosing slow pages, tuning delivery, measuring user experience, and reducing unnecessary network or rendering work.

Related concepts include Cache and Latency.

Additional Resource: MDN Web Docs Glossary.

Operations teams use this concept when setting baselines, diagnosing congestion, evaluating user experience, and deciding whether a service issue is caused by the network.

Related concepts include Routing.

Additional Resource: IETF Internet Architecture Board Network Guidance.