Learn FASTAPI with Real Code Examples
Updated Nov 25, 2025
Performance Notes
Extremely fast due to async nature and Starlette integration
Pydantic adds minor overhead for validation
Handles thousands of requests per second
Supports HTTP/2 via ASGI servers
Automatic JSON serialization improves throughput
Security Notes
Use HTTPS for secure communication
Validate all user inputs via Pydantic
Implement OAuth2, JWT, or API keys
Use CORS middleware for cross-origin requests
Keep dependencies updated to avoid vulnerabilities
Monitoring Analytics
Logging with standard Python logging or structlog
Monitor CPU, memory, and request metrics
Track endpoint performance
Integrate with Prometheus/Grafana
Profile async endpoints under load
Code Quality
Follow Python async best practices
Use Pydantic and type hints consistently
Write unit and integration tests
Document routes and dependencies
Apply modular structure with routers and services