Python vs. Golang vs. Java Performance: Which Is Faster?
Written by Gilad David Maayan   
Monday, 24 April 2023

Speed is usually a critical factor in any programming project, so when making the choice of which language to use you need to ask how they stack up in terms of performance. But, to quote an overworked phrase, that's a complicated question.

What Is Python?

Python is a high-level, versatile, and easy-to-read programming language, known for its support for packages and modules. Its extensive standard library offers various functionalities, including file handling, web services, and data manipulation. Python's thriving community has also contributed a plethora of external packages, enhancing its capabilities. 


The Python interpreter facilitates the execution of Python code, allowing developers to run their programs on various platforms seamlessly. Python's simplicity, powerful libraries, and cross-platform compatibility make it a popular choice for a wide range of applications.

What Is Golang?

Golang, or Go, is a statically typed, compiled programming language designed at Google. It resembles C in terms of syntax and performance, but offers Python-like usability, making it accessible and efficient. Go boasts improved build times and streamlined dependency management, preventing duplication of efforts in large-scale projects. 


A key feature of Go is its lightweight concurrency model using goroutines, which enables efficient handling of multiple tasks simultaneously. Golang combines the simplicity and productivity of Python with the performance and low-level capabilities of C, making it suitable for various applications, especially in concurrent and distributed systems.

What Is Java?

Java is a widely-used, versatile programming language, designed with inspiration from C++. Its syntax is simpler and more readable than C++, focusing on object-oriented programming principles. Java promotes code reusability and modularity, streamlining the development process. It is platform-independent, allowing developers to build entire applications that can run on multiple platforms seamlessly through the Java Virtual Machine (JVM). 


Java's simplicity, object-based approach, and cross-platform compatibility have made it a popular choice for building diverse applications, ranging from web and mobile apps to enterprise-level software systems.

Python vs. Golang vs. Java: Key Differences


Python has a syntax is simple, clean, and easy to read, making it beginner-friendly. It uses indentation to define code blocks, which promotes readability. Python is a dynamically-typed language, which can speed up the development process but may introduce runtime errors.

Go has a minimalistic and straightforward syntax, emphasizing simplicity and clarity. It is statically-typed and provides features like garbage collection, type inference, and support for concurrency. Go enforces strict formatting rules, resulting in consistent and readable code across projects.

Java has a more verbose syntax compared to Python and Go. It is statically-typed and follows an object-oriented programming (OOP) paradigm, making it familiar to developers experienced with languages like C++ and C#. Java has a steeper learning curve than Python and Go but provides a rich set of features and a mature ecosystem.

Compilation and Speed

Python is an interpreted language, which generally results in slower execution times compared to compiled languages like Go and Java. Python's performance can be optimized using JIT compilers (e.g., PyPy) or extensions written in C or other compiled languages.

Go is a compiled language, which typically results in faster execution times compared to interpreted languages like Python. It has a strong focus on simplicity, leading to quick compilation times and efficient binary files. Go also provides excellent support for concurrency, which can improve performance in certain applications.

Java is a compiled language that runs on the Java Virtual Machine (JVM), providing Just-In-Time (JIT) compilation and various garbage collection optimizations that contribute to its strong performance. Java's execution speed is generally faster than Python but can have longer startup times compared to Go.


Python currently suffers from its Global Interpreter Lock (GIL) which can limit the performance of multi-threaded applications, and affects its scalability, especially in high-concurrency situations. It can consume more memory and CPU resources than Go and Java for certain tasks. Python might not be the best choice for highly-scalable applications with high concurrency demands.

Go has a lightweight concurrency model using goroutines and channels, which enables efficient resource utilization and makes it well-suited for scalable applications with high concurrency requirements. Its low memory overhead and efficient garbage collection make it a popular choice for microservices and high-performance backend services.

Java has a mature ecosystem and extensive libraries that facilitate building scalable applications. It offers advanced concurrency support with threads, locks, and other synchronization primitives. Java applications tend to consume more memory compared to Go but can offer high throughput and low-latency performance in properly optimized systems.


Python has a large community and a mature ecosystem, ensuring stability and support for existing projects. However, Python 2 to Python 3 migration introduced some compatibility issues that required attention from developers.

Go has been developed with stability in mind, with a strong focus on backward compatibility. As a relatively young language, it has a smaller ecosystem than Python and Java, but it is rapidly growing and backed by a strong community and corporate support from Google.

Java has been around for decades and has a well-established, mature ecosystem. Its long history and widespread adoption across various industries contribute to its stability. Java continues to evolve, with new features and improvements being introduced regularly.

Python vs. Golang vs. Java: Which Is Faster and How to Choose

Each of the three languages—Python, Go, and Java—offers different levels of performance and speed, and the best choice for your project will depend on your specific requirements, preferences, and familiarity with the language. Here's a comparison of their performance and some general guidelines to help you choose:

  • Python: Being an interpreted language, Python is generally slower in execution compared to Go and Java. However, it excels in rapid development, scripting, and prototyping, where development speed is more important than runtime performance.

  • Go: As a compiled language with a focus on simplicity, efficient resource utilization, and strong concurrency support Go typically offers faster execution times compared to Python and is often on par with Java. Go is a good choice for high-performance backend services, microservices, and concurrent applications.

  • Java: As a compiled language that runs on the Java Virtual Machine (JVM), offering strong performance through Just-In-Time (JIT) compilation and garbage collection optimizations, Java usually provides faster execution speeds than Python and is well-suited for large-scale, complex applications.

To choose the right language for your project, consider the following factors:

  • Project requirements: Assess the specific performance needs of your project, such as execution speed, concurrency, or memory usage, and choose a language that aligns with those requirements.

  • Development speed: If rapid development and prototyping are crucial for your project, Python might be a better choice. For high-performance backend services, Go or Java could be more suitable.

  • Ecosystem and libraries: Evaluate the available libraries, tools, and frameworks for each language and choose one with a mature ecosystem and good support for your project's domain.

  • Team expertise: Consider the familiarity and expertise of your development team with each language, as this can significantly impact the development speed and the quality of the final product.

  • Community and support: A strong community and good support resources can help ensure the long-term success of your project. Python and Java have well-established communities, while Go is growing rapidly and has strong corporate support from Google.


In conclusion, the performance of Python, Golang, and Java varies based on the specific requirements and context of a project. Golang takes the lead in terms of raw performance and concurrency, while Java offers robust stability and scalability for enterprise applications. Python, on the other hand, shines in its simplicity, readability, and versatility, despite its lower execution speed.

Each language has its strengths and weaknesses, and the choice ultimately depends on factors such as project needs, developer familiarity, and available resources. It is essential to evaluate these aspects carefully to select the most suitable language for your project, ensuring optimal performance and success.


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Last Updated ( Monday, 24 April 2023 )