Fastapi vs flask performance Interestingly, Flask + psycopg2 + gunicorn beats out FastAPI + psycopg2 + gunicorn by almost 2x. 615 seconds. Flask: Flask operates on synchronous programming by default. Routing will be much faster from the box. Automatic generation of OpenAPI docs. On the other hand, FastAPI is a modern, To compare the performance of FastAPI and Flask, we’ll conduct benchmark tests using Apache Bench (ab), a popular tool for benchmarking HTTP servers. For projects that require rapid development and high performance, FastAPI is often the preferred choice in 2024. Key Technical Difference #1: Performance and Async. Decreasing bugs and Errors in code. Both Flask and FastAPI have unique strengths that cater to different needs. We’ll compare Flask vs FastAPI in a number of ways in this comprehensive guide to assist you in selecting the best option for your project. FastAPI vs Flask: Performance Comparison; Development Speed: FastAPI's Advantages Over Flask; Data Handling: FastAPI's Built-in Features vs Flask Extensions; Sources. Along with the requirements of your project, your learning experience is also an important factor when choosing a framework. Flask’s simplicity and maturity suit smaller projects, while FastAPI’s performance and modern features make it a potent choice for larger, high-performance applications. ‍ 5. Flask, being around since 2010, has a more mature ecosystem, while FastAPI, introduced in 2018, FastAPI vs Flask Performance Benchmark. IMO, Flask is easier than fastAPI. Speed and Performance: The Need for Speed. Discover the differences between FastAPI vs Flask: Compare their performance, ease of use, and features to choose the best Python web framework for your project. You can check the performance after deciding which library you will choose — Fastapi vs Flask. FastAPI has been making waves with features like: Asynchronous support, ensuring blazing-fast performance. Discover their performance, scalability, development speed, community support, documentation, database support, testing capabilities, and more. The difference in speed can be significant, especially for applications with many concurrent Compared to Django and Flask, FastAPI is indeed fast! This score chart from Techempowershows the difference in performance between the three frameworks. First, we looked at a description of each framework, then reviewed the pros, the cons, and a few use cases for each. FastAPI is built on top of the Starlette framework, which is optimized for high performance and asynchronous programming. FastAPI, consider Django for robust, full-stack complex web applications with many built-in features, Flask for lightweight, customizable projects, and FastAPI for high-performance APIs with automatic documentation. Thus, let’s discuss its pros and cons later. Critical differences between Flask and FastAPI. I'm still using gunicorn + meinheld worker for both flask and django on production. It is quite lively and busy with the addition of new Performance Comparison: FastAPI vs. When To Use FastAPI. 6+ based on standard Python type hints. Whether you’re gearing up to launch a feature-rich content management If you are comparing Starlette, compare it against Sanic, Flask, Django, etc. Lets discuss pros, cons and which framework needs to be used under what condition. Flask is literally the "do whatever you want" framework, whereas fastAPI has (at least what I consider) to be a pretty well-established FastAPI endpoint -> pydantic -> database (I use sqlalchemy) paradigm that's pretty damn useful for validation, doc creation, and things like pre and post processing using validators. Flask version upto 1. Discussion on The Impact of Performance on Real-World However, Flask’s flexibility can also be its challenge—lack of conventions means more decisions, which might slow development for larger teams. This detailed article offers an insightful comparison of these two leading Python In today’s article, we reviewed the differences between Flask and FastAPI. So this is what I'm going to focus on, a comparison between Flask, , Flask-Pydantic-Spec at /apidoc/redoc and /apidoc/swagger, and FastAPI at /redoc and /docs. Differences between FastAPI and Flask. Independent benchmarks, such as those from TechEmpower, In this blog post, we will compare FastAPI and Flask, highlighting their key features, performance, and use cases, along with some code snippets to demonstrate their capabilities. You can increase performance on production by using other webserver and other worker. For applications requiring high concurrency, real-time capabilities, and a vast selection of third-party libraries, Node. FastAPI: As the name suggests, FastAPI is designed with speed in mind. FastAPI is built on top of Starlette and Uvicorn, which are optimized for speed. js. Some of the key features of FastAPI include: Speed: FastAPI is one of the fastest web frameworks for building APIs, allowing you to handle a high volume of requests What is FastAPI? FastAPI, ranked as the 3rd most popular framework, is a modern, fast web framework for building APIs with Python 3. To quantify the performance difference between Django and FastAPI, let’s take a look at some benchmark results. . Choose FastAPI if you need high performance, async support, and automatic features for modern, scalable applications. This is required because BaseModel comes from the Pydantic library and has the functions necessary for data validation. FastAPI is significantly faster than Flask due to its use of Python type annotations, which enables static type checking and code optimization. Django: Django’s learning curve can be steep for beginners because it is a fully-featured and highly structured framework. Flask vs. Get FastAPI Flask; Architecture: MVT (Model-View-Template) ASGI (Asynchronous Server Gateway Interface) WSGI (Web Server Gateway Interface) Performance: Moderate: High: Moderate: Ease of Use: Moderate (steeper learning curve) Easy (especially with type hints) Easy: Built-in Features: Many (admin interface, ORM, authentication, etc. As a result, here’s my comparison of FastAPI and Flask. Has Good speed and performance when compared with Flask. Performance; FastAPI is way faster than Flask, and it’s actually one the fastest web frameworks for Python. Its asynchronous nature allows it to handle a large number of concurrent requests efficiently. 0 uses a synchronous model by default , which means it processes requests one at a time. For developers prioritizing performance, asynchronous programming, and modern API features, FastAPI is hard to beat. While Flask has long been the go-to lightweight framework for Python developers, FastAPI has quickly risen in popularity thanks to its modern features, performance, and developer-friendly design. When choosing between FastAPI vs Node js, consider your project-specific needs: if you prioritize performance, data-intensive operations, and automatic documentation, FastAPI may be the better choice. Examples of projects where Flask is a good choice. Leveraging asyncio and FastAPI and Flask are both web frameworks that facilitate the development of web applications and APIs using Python. This can Among them, Flask has long been a popular choice for lightweight web applications, while FastAPI has recently surged in popularity, especially for building APIs due to its speed, simplicity, and Flask and FastAPI, two well-known Python web frameworks, each have special advantages that can have a big impact on your application’s performance and development FastAPI is significantly faster than Flask due to its use of Python type annotations, which enables static type checking and code optimization. I wrote an application to create, update, download, and delete news in these two frameworks. For more detailed benchmarks, refer to the TechEmpower benchmarks. Concurrency; It used When it comes to Flask vs FastAPI comparison in rendering HTML, both rely on the Jinja2 templating library. Ultimately, the comparison between FastAPI and Flask reveals two frameworks with distinct strengths, ensuring that developers can make choices that are aligned with the unique demands of their web development process. What is Flask Python; FastAPI vs. Performance. Speed: FastAPI is generally faster than Flask. Therefore now we can conclude that we can use FastAPI for its high performance in API development, Flask can be used to build small to medium projects with great flexibility, and Django to build feature Less Performance for APIs: Compared to FastAPI, Flask is slower, especially when handling APIs that require high performance and low latency. The FastAPI framework gives you a greater selection of API administration and tools to keep a check on the applications. Web frameworks (or microframeworks). Choosing between these frameworks resembles selecting the perfect tool for a specialized job, where success hinges on how well it aligns with your project's unique demands. Flask is a lightweight option suitable for small to medium-sized applications, while FastAPI offers advanced features like automatic data validation and asynchronous support for high-performance APIs. I think performance is about the same for all of them in the grand scheme of things. If performance is critical, then FastAPI is a better choice. This is because it uses asynchronous code, which allows it to handle requests concurrently. The only framework that is faster than FastAPI is Starlette (fun fact - FastAPI is actually built on Starlette). Flask vs FastAPI: Factor-Wise Comparison. This design allows FastAPI to handle large volumes of concurrent connections efficiently, making it ideal for real-time web applications and high-performance APIs. Parameters. Python FastAPI is designed for high performance from the ground up. Until next time, cheers! References. This can lead to slower performance under high load or FastAPI + SQLModel + gunicorn compared to Nest. Explore the differences between FastAPI and Flask, focusing on performance, ease of use, and features for web development. Performance Comparison: Flask vs FastAPI Performance is a crucial factor when choosing a web framework. Flask is a micro web framework that shines when building small to medium applications, thanks to its simplicity and ease of use. After a little over a year since my previous article about Abandoning Flask for FastAPI, I enjoyed learning more about the differences between the two besides the syntax, which had been the focus of the original article. This can lead to slower performance under high load or when dealing with I/O FastAPI vs. Stay tuned for more insights on Flask vs. Learn which Python framework is best suited for your next project based on performance, flexibility, and community support. May 30, 2023. FastAPI is built on top of the Starlette framework, a lightweight ASGI Speed and Performance: Django vs Flask vs FastAPI Learning Curve and Ease of Use. Django is arguably more production ready than any of these. FastAPI: The Rising Star. On the other hand, FastAPI shines when building high-performance, asynchronous APIs with automatic validation and In the realm of web development, the debate between Flask and FastAPI is more relevant than ever in 2024. One of the biggest differences between Flask and FastAPI is performance. Speed and Performance. FastAPI: The same way that Starlette uses Uvicorn and cannot be faster than it, FastAPI uses Starlette, so it cannot be In summary, when evaluating development speed between FastAPI and Flask, FastAPI offers several advantages that can lead to faster development cycles, reduced bugs, and improved overall efficiency. Make an informed decision in selecting the ideal framework for your web devel Refactor for Async I/O: If your existing Flask application doesn’t use async I/O, take advantage of FastAPI’s async/await features during the migration for optimal performance. If you’re building a small-scale project or prefer simplicity, Flask is a reliable choice. This happens as a result of asynchronous request processing. I have used Flask in the past, but recently I have been using Nodejs, so the async nature of FastAPI will make it similar to Nodejs, plus I have read that it's better for making APIs. Both frameworks are powerful tools for Python developers. In Understanding FastAPI What is FastAPI? FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3. Performance Comparison Between FastAPI and Flask. Flask is perfect for small-to-medium projects that don’t require high concurrency or complex asynchronous operations. Benchmarking Results and Comparisons Based on Various Metrics. Great Performance : F astAPI is a modern, fast, web framework for building APIs with Python 3. For high-performance applications dealing with high concurrency needing minimal latency FastAPI vs Flask — A Comparative Analysis. In contrast, Flask is a WSGI framework that may not perform as well under high load conditions. FastAPI , and let’s chat in the comments! Flask vs Fast API 1. Flask. The following score chart from Techempower shows how much difference in performance there is between the frameworks. Whether building a simple website or a full-scale web app with third-party integrations, learning Choosing between Flask and FastAPI boils down to your project requirements: Go with Flask if you want simplicity and flexibility for smaller projects. Both Flask and FastAPI are powerful frameworks with unique strengths. For applications that require high performance and rapid development, FastAPI is often the preferred choice. It is designed to be easy to use, productive while also being fast and efficient. js + Prisma is about a 2x difference. For each framework, I created an API endpoint that returns 100 rows of data from a PostgreSQL database. js and Go. GitHub Gist: instantly share code, notes, and snippets. FastAPI excels in terms of performance due to its asynchronous nature and use of Python’s type hints. FastAPI and Flask Performance. Flask: While Flask may not match FastAPI in raw performance, its simplicity and minimalistic design make it a strong With options like Django, Flask, and FastAPI, each catering to different needs and scenarios, making the optimal choice becomes crucial. 541 seconds. Introduction to The Difference in Performance: Fastapi vs Flask. FastAPI is built on top of the Starlette framework, which is optimized for high Two robust Python frameworks, Flask and FastAPI, are the go-to tools for building robust and scalable APIs, accelerating time-to-market. This makes FastAPI superior to Flask for larger-scale machine Comparison between Flask and FastAPI Performance. 681 seconds. Flask vs FastAPI Performance. 4. FastAPI (Python): FastAPI is one of the fastest frameworks in the Python ecosystem, thanks to its asynchronous capabilities. Created by Sebastián Ramírez, FastAPI is designed to be easy to use and provide high performance, similar to Node. When compared to Flask, FastAPI has less community support but it reaches a lot in a short period of time When deciding between Flask or FastAPI, consider the project's complexity, performance needs, and the development team's expertise. Type. When choosing between Django vs. Serializing will be much faster thanks to a great Pydantic library that FastAPI uses. In summary, when comparing FastAPI vs Flask performance, FastAPI stands out due to its asynchronous capabilities, automatic data validation, and overall speed in both execution and development. In conclusion, when evaluating FastAPI vs Flask performance, FastAPI stands out as the superior choice for high-performance applications, particularly those that require handling numerous concurrent requests efficiently. Advantages and Disadvantages of FastAPI Advantages: FastAPI is properly fast when we compare it to other major Python frameworks like Flask and Django. Full-stack web framework. js, Flask, and Nest. Jinja2 is simple and flexible. Flask: Performance. Shortly, FastAPI supports asynchronous code and has great documentation, and it’s quite different from Django and Flask. 1. Flask: Time taken for tests: 5. Therefore, working with a web framework should be quick and easy. 7+ based on standard Python type hints. FastAPI is designed to be easy to use, highly performant, and capable of handling high-traffic production workloads. FastAPI utilizes ASGI (Asynchronous Server Gateway Interface) under the hood while Flask is built on WSGI (Web Server Gateway Interface). What are the key differences between FastAPI and Flask in terms of performance? Comparison Between FastAPI vs Django. Whether you're serving up data to hungry web applications or handling millions of requests per second, your API needs to be lightning-fast to provide an optimal user experience and ensure efficient resource utilization. Production ready doesn't just mean performance, it means stability. The pyframework benchmarks are also quite flawed. Micro-web framework. This post will compare the advantages and disadvantages of these three frameworks, as well as their use cases, and With Uvicorn Workers FastAPI is nearly 48x faster than Flask, which is very understandable. Django. This article will walk through a detailed comparison of FastAPI and Flask, covering performance, use cases, code-level examples, and ecosystem compatibility. It is built on asynchronous capabilities and can handle high-performance Has Good speed and performance when compared with Flask. FastAPI. This limits Is speed a really important factor for you? If so, FastAPI is definitely a clear winner here. Flask is popular due to its simplicity, flexibility, and a vast community of creative tech Flask and FastAPI, two well-known Python web frameworks, each have special advantages that can have a big impact on your application’s performance and development process. FastAPI generally outperforms Flask, especially in Higher learning curve: FastAPI’s reliance on modern Python features like type hints and asynchronous programming can make it a bit more challenging for beginners to learn compared to Flask. The most foundational architectural difference between FastAPI and Flask comes down to performance, scaling and support for async/await. FastAPI: Excels in performance benchmarks and is used in high-performance applications like the OpenAPI project. FastAPI is built on top of Starlette for the web parts, and Pydantic for the data parts. FastAPI: However, compared to newer frameworks like FastAPI, it is still catching up on the number of users since the features are relatively modern and the performance is very good. Python’s web development ecosystem is packed with robust frameworks, but two of the most popular options for building web applications and APIs are Flask and FastAPI. Explore a detailed comparison of FastAPI, Flask, and Django - three popular Python web frameworks. It Generates Automatic documentation; Built-in data FastAPI has High and Fast performance, Efficiency and it’s easy to understand and learn. Some of the most popular web frameworks are Django, Flask and FastAPI. When compared to Flask, FastAPI has less community support but it reaches a lot in a short period of D eciding on the right web development framework to use is vital to developing a fast, scalable, and efficient web application. Among some of those differences included the learning curve, the community, the flexibility, how Flask is WSGI, and how FastAPI is ASGI. FastAPI performs significantly better in terms of efficiency. Microframeworks are a great start for small projects, MVPs, or even large systems that need a REST API—including Flask and FastAPI. Flask, on the other hand, is a traditional synchronous framework. While it can handle asynchronous operations using extensions like aiohttp, the setup feels a bit bolted on. In the realm of APIs, speed and performance are paramount. FastAPI leverages Python’s async capabilities (async/await) to Hello, I'm going to build a microservice that processes images and does OMR on them, and I'm torn between using Flask or FastAPI. Flask vs FastAPI Performance Flask version upto 1. ) Few (focus on Flask vs Falcon vs FastAPI benchmark. It Generates Automatic documentation; FastAPI has High and Fast performance, Efficiency and it’s easy to understand and learn. ASGI vs WSGI, so i ran with 1 concurreny:. Extensibility: FastAPI is highly extensible, with support for custom middleware, plugins, and third-party integrations, allowing you to tailor the framework to your needs. Released in 2018 by Sebastián Ramírez, The choice between Flask and FastAPI is a significant decision that should align with your project’s goals and your team’s expertise. Hopefully, you found this interesting as well. In benchmark tests, FastAPI consistently outperforms Flask in terms of requests per second, especially for I/O-bound operations. If you want fast, I'd write it in Go or Rust. Framework Overview. FastAPI - Pure Uvicorn: Time taken for tests: 2. I ran more tests to test out Flask with a production In a previous article, I benchmarked FastAPI, Express. Comparing Flask, Django, and FastAPI: Learning Curve, Performance, and Flask is perfect when you need something lightweight and flexible, while FastAPI is a powerhouse for high-performance APIs with tons of out-of-the-box features. We’ll create two simple web In this article, we’ll dive into a performance showdown between FastAPI vs Flask, examining how each framework handles high-traffic scenarios and which might be the better One of the most significant differences between FastAPI and Flask is their performance characteristics. Django: Pros and Cons In benchmarks, FastAPI often outperforms Flask, especially in scenarios with high concurrency. DIFFERENCE TABLE. Comparing Flask, Django, and FastAPI: Learning Curve, Performance, and Use Cases Now that we have an overview of these frameworks, let's compare them in terms of 'Ease of Learning', 'Performance', and 'Use FastAPI is a modern web framework built for high-performance web APIs. Learn about speed, scalability, ease of use, and real-world use cases to make an informed decision for your web applications. Both Flask and FastAPI are excellent frameworks for building REST APIs, but they excel in different areas. js is likely more suitable. Is it safe to say that FastAPI is not on par with the Node. Flask : Suitable for smaller web applications, such as the microblogging platform Discover the key differences between Flask and FastAPI in 2025. Flask 🐍FastAPI vs Flask 🌶️v⚡ FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3. Flask vs FastAPI: Performance Comparison. js frameworks in terms of performance? Or have I conducted the tests incorrectly? Performance and Speed: FastAPI vs Flask. FastAPI - UvicornWorkers: Time taken for tests: 1. FastAPI is becoming popular because it's easy to use, performs well, and supports modern Python features like type hints and async/await. The focus on FastAPI vs Flask performance underscores the pivotal role the framework choice plays in meeting your project's specific requirements. Conclusion. It has a tiny templating language with loops, conditions Discover the performance differences between FastAPI and Flask in 2024. I also did a small test myself to see which framework is the fastest, and the results are actually quite interesting. FastAPI is built on top of Starlette, which is a lightweight ASGI framework, and it’s been optimized for speed. FAQs. In the FastAPI is becoming popular because it's easy to use, performs well, and supports modern Python features like type hints and async/await. If you plan to use async, FastAPI is better in that regard as well, even though Django team has done a good job in this area 1. In this article, we’ll dive into a performance showdown between FastAPI vs Flask, examining how each framework handles high-traffic scenarios and which might be the better choice for your next Flask/Quart are therefore best compared with Starlette, and FastAPI is best compared with relevant Flask, Quart, and Starlette extensions. 0 uses a synchronous model by default, which means it processes requests one at a time. Flask 1. In Python web development, Flask, Django, and FastAPI are all popular frameworks. js in order to verify FastAPI’s claims of being on par with Node. While benchmarks should be taken with a grain of salt and may vary depending on the specific use case We can notice that FastAPI’s NewsSchema / CreatorSchema use BaseModel as a parent class. In the world of Python, the two most popular web frameworks are Flask and FastAPI, and they each have their unique advantages and use cases. Works; Blog; About us; FastAPI is a modern Python web framework designed to build APIs with high performance and simplicity. In this article, I am pitting the champion, FastAPI, against a new set of faster competitors. gckfkn ugpcqc ojtyja dcymx oatark txoy rqojby jqaklkva yubxz tmc