API Performance Testing—Key Considerations for Modern APIs

API performance testing ensures smooth and efficient user experiences by evaluating how an API performs under various conditions. Key aspects include proactively monitoring performance to resolve potential issues, measuring metrics such as response time, error rate, throughput, uptime, and successful HTTP status codes, and utilizing real user data for realistic test scenarios.

Best practices include deriving SLOs and SLAs from measured performance metric benchmarks, including synthetic monitoring to cover the entire transaction path to third-party APIs, and adopting tools that support all API types as well as microservices and serverless computing.

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