Load testing guides

Load test REST and GraphQL APIs at a fixed request rate, with per-second latency and error charts.

Step the request rate up until a threshold breaks, and find the last rate your site handled.

Run HTTP load tests against any endpoint. GET, POST, PUT and DELETE with custom headers and payloads.

Benchmark your REST API performance with precise p50, p95, p99 latency metrics. Compare endpoints and track regressions over time.

Load test your GraphQL API with realistic queries and mutations. Measure resolver performance and find N+1 query bottlenecks.

Load test WebSocket servers with hundreds of concurrent connections. Validate message throughput, latency, and connection stability.

Test how your application handles sudden traffic spikes. Simulate flash sales, viral moments, and DDoS-like scenarios safely.

Run extended soak tests to find memory leaks, connection pool exhaustion, and performance degradation over time.

Use load testing for infrastructure capacity planning. Determine how many users your servers can handle and when to scale.

Complete performance testing checklist: test types, metrics to measure, tools to use, and common mistakes to avoid.

Load test gRPC services with k6. Measure unary and streaming RPC performance under concurrent connections.