add_process_time_header() — fastapi Function Reference

Architecture documentation for the add_process_time_header() function in tutorial001_py39.py from the fastapi codebase.

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FastAPI→ Applications→ add_process_time_header() — fastapi Function Reference

Dependency Diagram

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  77c0b3ae_c2e1_8ff5_0054_13a578727ae6["add_process_time_header()"]
  530e41d5_fbce_3a44_52fc_3c92f1d5b0bc["tutorial001_py39.py"]
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Source Code

docs_src/middleware/tutorial001_py39.py lines 9–14

async def add_process_time_header(request: Request, call_next):
    start_time = time.perf_counter()
    response = await call_next(request)
    process_time = time.perf_counter() - start_time
    response.headers["X-Process-Time"] = str(process_time)
    return response