+**Response Time** measures the duration from an input's initiation to the first observable output from a system. It is a critical metric for [User Experience](/wiki/user_experience) and overall system responsiveness, directly affecting the perceived [System Performance](/wiki/system_performance).
+## See also
+- [Latency](/wiki/latency)
+- [Throughput](/wiki/throughput)
+- [Real Time](/wiki/real_time)
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