What Is Spike Testing?

The purpose of spike testing is to evaluate how a system responds to sudden, extreme increases in user load and how quickly it recovers once traffic returns to normal.

Spike testing introduces abrupt traffic surges, while load testing gradually increases traffic to expected levels to measure steady-state performance.

Applications with unpredictable, event-driven, or high-concurrency traffic patterns benefit most from spike testing, including cloud-based and high-availability systems.

Spike testing can reveal performance bottlenecks, memory leaks, autoscaling failures, increased error rates, and slow recovery behavior.

Spike testing should be performed regularly, especially before major releases, infrastructure changes, or anticipated traffic events, and ideally integrated into CI/CD workflows.