Learn FLASK with Real Code Examples
Updated Nov 25, 2025
Performance Notes
Lightweight, minimal overhead
Single-threaded by default, can scale via WSGI servers
Extensions may add latency
Use caching for repeated queries
Async support available via Flask 2.x
Security Notes
Use HTTPS in production
Sanitize user inputs and escape templates
Use Flask-Login or Flask-Security for auth
Implement CSRF protection for forms
Keep Flask and extensions updated
Monitoring Analytics
Log requests and errors
Track memory and CPU usage
Use Flask-Admin or third-party analytics
Integrate with monitoring tools
Profile high-traffic endpoints
Code Quality
Follow Python PEP8 standards
Use Blueprints and modular code
Write unit and integration tests
Document routes and view functions
Use async/await where applicable