Latency Testing

What is Latency Testing?

Latency testing focuses on how long the application takes to respond—page loads, interactions, API calls—under different network and load conditions. Even a fully correct feature delivers a poor experience if it's slow, so measuring and asserting on response times protects perceived performance. Tests can simulate throttled networks and capture timing to catch regressions where a change quietly makes something sluggish. Combined with functional checks, latency measurement ensures a flow is not just correct but acceptably fast for real users.