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Tornado VS FastAPI

Compare Tornado VS FastAPI and see what are their differences

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Tornado logo Tornado

A Python web framework and asynchronous networking library, originally developed at FriendFeed

FastAPI logo FastAPI

FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.
  • Tornado Landing page
    Landing page //
    2018-09-29
  • FastAPI Landing page
    Landing page //
    2023-05-14

Tornado features and specs

  • Asynchronous Networking
    Tornado's core is built on non-blocking network I/O, making it suitable for applications that require a high level of concurrency and can benefit from asynchronous networking.
  • WebSockets Support
    Native support for WebSockets allows Tornado to handle real-time web applications, such as live chats or streaming services, more efficiently.
  • Scalability
    Tornado can handle thousands of simultaneous connections, which makes it highly scalable and an excellent choice for applications expecting high traffic volume.
  • Integrated with asyncio
    Tornado is compatible with Python's asyncio library, providing more flexibility in managing asynchronous operations and integration with other modern async Python libraries.
  • Template Engine
    Comes with a built-in template engine, making it easy to build dynamic web pages without needing to integrate additional templating tools.
  • Long-Polling and SSE
    Supports long-polling and Server-Sent Events (SSE), providing more options for real-time data transfer in web applications.

Possible disadvantages of Tornado

  • Steeper Learning Curve
    Requires a good understanding of asynchronous programming and non-blocking I/O, which can be challenging for developers who are accustomed to synchronous paradigms.
  • Smaller Community
    Compared to other frameworks like Django or Flask, Tornado has a smaller community, which may result in fewer resources, tutorials, and third-party plugins.
  • Limited Out-of-the-Box Features
    Tornado is more low-level and does not come with built-in support for many web development features (e.g., authentication, ORM) that are readily available in other frameworks.
  • Performance Overhead
    The performance benefits of Tornadoโ€™s asynchronous capabilities are more noticeable in I/O-intensive applications. For CPU-bound tasks, the performance gains may be negligible or require additional libraries for parallel processing.
  • Compatibility Issues
    Older versions of Tornado may have compatibility issues with the latest Python releases or other modern async libraries, necessitating careful version management.
  • Less Beginner-Friendly
    Tornadoโ€™s emphasis on low-level control and asynchronous design patterns makes it less beginner-friendly compared to more opinionated, batteries-included frameworks.

FastAPI features and specs

  • High Performance
    Built on Starlette and Pydantic, FastAPI is one of the fastest frameworks for Python, providing high performance due to its asynchronous request handling.
  • Automatic Interactive API Documentation
    FastAPI automatically generates interactive API documentation via Swagger UI and ReDoc, which are very helpful for development and testing.
  • Type Checking and Validation
    With Pydantic models and Python type hints, FastAPI provides automatic data validation and type checking, reducing the chance of runtime errors.
  • Ease of Use
    Its syntax and design make it easy to learn for Python developers, offering a smooth development experience while reducing boilerplate code.
  • Asynchronous Support
    FastAPI supports asynchronous programming, allowing for better performance for I/O-bound operations, making it optimal for handling many simultaneous connections.
  • Extensive Documentation
    It has comprehensive and well-structured documentation, which is very useful for both beginners and advanced users.
  • Community and Ecosystem
    FastAPI has a growing community and ecosystem, with many plugins and integrations available to extend its functionality.

Possible disadvantages of FastAPI

  • Learning Curve for Asynchronous Programming
    Although FastAPI itself is easy to learn, grasping the concepts of asynchronous programming in Python can be challenging for beginners.
  • Complex Dependencies
    Using Pydantic for advanced validation can make the request models complex, requiring a deeper understanding of Pydantic and its functionalities.
  • Early Stage Libraries
    Some third-party libraries and extensions specifically tailored for FastAPI might still be in early stages of development and lack long-term stability.
  • Limited Real-World Examples
    Although the documentation is extensive, there might be limited real-world examples and case studies readily available compared to more mature frameworks.
  • Deployment Complexity
    Deploying FastAPI applications might be more complex in comparison to traditional synchronous frameworks, mainly due to the need for asynchronous server setups.

Analysis of Tornado

Overall verdict

  • Tornado is a good choice if you need a highly concurrent web framework that's capable of handling a large number of open connections efficiently. It may not be the best choice for traditional web applications where synchronous processing is more prevalent.

Why this product is good

  • Tornado is known for its high performance and ability to handle thousands of simultaneous connections, making it an excellent choice for building high-traffic applications. It is lightweight and designed to efficiently deal with asynchronous operations, which is ideal for real-time web services.

Recommended for

  • Real-time web services
  • Applications with long-lived network connections
  • High-performance applications requiring non-blocking network I/O
  • Websockets-based communication

Analysis of FastAPI

Overall verdict

  • FastAPI is widely regarded as a good choice, especially for applications that require high performance, scalability, and modern Python features. It is suitable for both simple and complex projects, making it a versatile tool in the web development ecosystem.

Why this product is good

  • FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It is built on top of Starlette for web framework capabilities and Pydantic for data validation and settings management. FastAPI is known for its excellent performance, automatic generation of interactive API documentation (with Swagger and Redoc), and support for asynchronous programming. Developers appreciate its ease of use, detailed documentation, and helpful error messages.

Recommended for

  • Developers building RESTful APIs
  • Teams looking for a high-performance ASGI-based web framework
  • Projects that require asynchronous programming capabilities
  • Applications needing automatic generation of interactive API documentation
  • Python developers who prefer utilizing type hints for code clarity and validation

Tornado videos

Review Honda Tornado 250

More videos:

  • Review - Tevo Tornado 2018 edition review: Big volume, big value
  • Review - The Retro51 Tornado Pen: The Full Nick Shabazz Review

FastAPI videos

FastAPI from the ground up

More videos:

  • Tutorial - 30 Days of Python - Day 14 - Web App with Flask, FastAPI, ngrok, and Invictify - Python TUTORIAL
  • Review - [PT] Python - API com FastAPI - Chat | twitch.tv/codeshow

Category Popularity

0-100% (relative to Tornado and FastAPI)
Web And Application Servers
Developer Tools
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Web Servers
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API Tools
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User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Tornado and FastAPI

Tornado Reviews

25 Python Frameworks to Master
Tornado is an open-source asynchronous web framework and networking library for building web applications using Python. It was originally developed at FriendFeed, a social media aggregator that was later acquired by Facebook. Itโ€™s now widely used in a variety of applications, including web services, real-time analytics, and other high-concurrency applications.
Source: kinsta.com
Exploring 5 Alternatives to Flask in Python for Web Development
Tornado is a scalable web framework in Python that is well-suited for real-time web applications. It provides a non-blocking I/O loop that enables developers to handle thousands of connections at once. Tornado also has support for various third-party plugins and tools that can be easily integrated into the framework. To install Tornado, use the following command:
Source: msalinasc.com
Top 5 Asynchronous Web Frameworks for Python
Tornado has a strong and committed following in the Python community and is used by experienced architects to build highly capable systems. Itโ€™s a framework that has long had the answer to the problems of concurrency but perhaps didnโ€™t become mainstream as it doesnโ€™t support the WSGI standard and was too much of a buy-in (remember that the bulk of Python libraries are still...
Source: geekflare.com

FastAPI Reviews

  1. Kurslog team
    ยท Working at Kurslog ยท

    When our backend team needs to build services for data parsing, aggregators, or high-load APIs, FastAPI is our absolute go-to choice. It completely lives up to its name-development speed is outstanding.

    The combination of Pydantic for data validation and built-in async support keeps our shared codebase clean, strictly typed, and reliable. But the biggest highlight for our cross-functional team is the automatic generation of interactive OpenAPI (Swagger) documentation. Our frontend and mobile developers no longer have to wait for backend engineers to manually update API docs; everything stays perfectly in sync automatically. It has drastically improved our team's communication and delivery speed.

    Pros:    Blazing fast performance (on par with nodejs and go)|Native asynchronous support out of the box|Automatic, interactive documentation generation (swagger/redoc)|Strict typing and data validation with pydantic
    Cons:    Smaller plug-and-play ecosystem compared to older frameworks like django|Requires our architects to design the project structure and directory layout from scratch

The 20 Best Laravel Alternatives for Web Development
FastAPI, as the name hints, is a swift mover. Built on Starlette, itโ€™s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now thatโ€™s something.
25 Python Frameworks to Master
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack frameworks like Django.
Source: kinsta.com
3 Web Frameworks to Use With Python
myapp/ is the main directory of your FastAPI application. It includes all the other files and directories needed for the application.static/ is a directory used to store static assets such as CSS, JavaScript, and image files. These assets are served directly by the web server and are typically used to add visual styling and interactivity to the application.css/, img/, js/...
Best Alternatives to FastAPI App Free for Windows (2021)
FastAPI Alternative โ€“ So many alternatives app to FastAPI that you must to know out there. And, looking for an ideal software was not easy matter. Lucky you, at this page you can find the best replacement app for FastAPI. So what you are waiting for, get the latest FastAPI alternative app for Windows 10 from this page.
Top 5 Back-End Frameworks to Consider for Web Development in 2021
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It is fast when compared to other major Python frameworks like Flask and Django. FastAPI gives great flexibility to fulfill businessesโ€™ API needs in todayโ€™s evolving world.

Social recommendations and mentions

Based on our record, FastAPI seems to be more popular. It has been mentiond 312 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Tornado mentions (0)

We have not tracked any mentions of Tornado yet. Tracking of Tornado recommendations started around Mar 2021.

FastAPI mentions (312)

  • I Built My First Machine Learning API โ€” Here's Everything I Learned
    I used FastAPI, a Python framework built specifically for creating APIs quickly, with automatic validation and interactive documentation baked in. - Source: dev.to / 18 days ago
  • Shipping Sovereign SDK: Cryptographic Forensic Receipts and the End of the AI "Prose Tax"
    The Sovereign SDK is a Python-native framework designed to minimize prose overhead while generating ironclad, cryptographic execution receipts for AI agents, complete with drop-in FastAPI/Starlette ASGI middleware. - Source: dev.to / 3 months ago
  • 5-Minute AI Jobs and Closed Tabs โ€” Why We Built Replay-Then-Tail SSE
    We had a feature in production where a single user request could run for five-plus minutes โ€” fetch documents, chunk them, hit an LLM per chunk, synthesize a final answer. We did the obvious thing first: a FastAPI handler that ran the pipeline and streamed progress back to the browser over Server-Sent Events. - Source: dev.to / 4 months ago
  • FastAPI With LangChain and MongoDB
    FastAPI is a Python framework for building APIs quickly, efficiently, and with very little code. - Source: dev.to / 5 months ago
  • I Built A " CrowdSense AI " : A Scalable, Context-Aware Platform for Smart Stadiums
    Backend: Python-based FastAPI for its asynchronous I/O capabilities and rapid JSON serialization. - Source: dev.to / 5 months ago
View more

What are some alternatives?

When comparing Tornado and FastAPI, you can also consider the following products

Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies

Flask - a microframework for Python based on Werkzeug, Jinja 2 and good intentions.

LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple

Microsoft IIS - Internet Information Services is a web server for Microsoft Windows

Django - The Web framework for perfectionists with deadlines