FastAPI is fast by default — but these tips make it blazingly fast.

10 Performance Tips to Make Your FastAPI App Lightning Fast ⚡

Speed matters. Here’s how to optimize your FastAPI app without overcomplicating your code.

Photo by Florian Olivo on Unsplash

FastAPI is already one of the fastest Python web frameworks out there — but fast doesn’t mean optimized. Once your app starts handling real traffic, performance bottlenecks can creep in where you least expect them.

Whether you’re building an MVP or deploying a high-load microservice, here are 10 actionable tips to supercharge your FastAPI app and unleash its full potential. Let’s dive in.

1. Use uvicorn with gunicorn (for production)

While uvicorn is great for development, running it solo in production isn't ideal.

Instead, pair it with gunicorn for multi-worker support:

gunicorn app.main:app -k uvicorn.workers.UvicornWorker --workers 4

This combo helps you leverage multiple CPU cores and improves throughput dramatically.

Pro Tip: Start with workers = (2 × CPU) + 1 as a rule of thumb.

2. Enable Async Everywhere