FastAPI Profiler

fastapi-profiler is a FastAPI Middleware that integrates pyinstrument to provide request profiling and performance analysis for FastAPI applications. It helps developers identify bottlenecks by generating detailed reports (HTML, speedscope, JSON, .prof files). As of version 1.5.0, it supports sampling, error auto-capture, and structured JSON logging. It generally follows a regular release cadence, with several minor releases a year.