diwas2055 / fastapi-performance

Increase FastAPI Performance

Guide to increase the performance of your FastAPI application

List of tips to increase the performance of your FastAPI application

1. Use uvloop (+10%) , uvloop is a fast,drop-in replacement of the built-in asyncio event loop.
2. Use httptools (+10%) , "fast parsing" Python blinding for nodejs HTTP parser ,you just need to install it and it will be used automatically by uvicorn .
3. Use bigger thread pool size (+5%) , by default uvicorn uses 4 threads , you can increase it by passing --workers flag to uvicorn command.
4. Use simple async applications (+15%) , no overhead of threads and processes.
5. Remove duplicate validation (+25%), have only FastAPI do this validation.
6. Use ORJSON (+5%), if not using the lastest Pydantic version already.