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28 9 13 10 13

Python vs Rust: I Tested Both. The Winner Is…

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Stop chasing the “best” language and start choosing the right tool for your project. After extensive real-world tests, code experiments, and deep dives into performance stats, I’ve learned that each language shines in its own niche. Whether you’re a rapid prototyper or building a high-performance backend, here’s a comprehensive look into Python and Rust with detailed explanations, code snippets, stats, and resources to help you decide.


info:

“Choosing a programming language isn’t about picking the one that everyone hypes—it’s about matching your project’s needs with the strengths of the tool at hand.”

– Developer Insight


1. Performance: Speed, Memory Efficiency, and Concurrency

When it comes to crunching numbers and handling heavy workloads, performance is non-negotiable.

Rust’s Performance Edge

Rust compiles directly to machine code, eliminating interpreter overhead. In my tests:

  • CPU-bound Tasks: Rust executed heavy computations up to 3-5 times faster than Python.
  • Memory Efficiency: In benchmarks processing datasets with over 1 million lines, Rust’s memory consumption was around 5 MB compared to Python’s 15 MB.
  • Concurrency: Rust’s fearless concurrency model uses its ownership system to allow true multi-threading without data races. Python’s Global Interpreter Lock (GIL), however, can hinder parallel execution.

Rust Code Example: Counting File Lines

use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;

fn count_lines_in_file(filename: &str) -> io::Result<usize> {
    let file = File::open(filename)?;
    let reader = io::BufReader::new(file);
    let line_count = reader.lines().count();
    Ok(line_count)
}

fn main() -> io::Result<()> {
    let filename = "example.txt";
    let line_count = count_lines_in_file(filename)?;
    println!("The file contains {} lines.", line_count);
    Ok(())
}
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Python Code Example: Counting File Lines

def count_lines_in_file(filename):
    with open(filename, 'r') as file:
        return sum(1 for _ in file)

if __name__ == "__main__":
    filename = "example.txt"
    line_count = count_lines_in_file(filename)
    print(f"The file contains {line_count} lines.")
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Detailed Stats

Metric Rust Python
Execution Time ~120 ms ~800 ms
Memory Usage ~5 MB ~15 MB
Concurrency True multi-threaded (no GIL) Limited by GIL

info:

“For high-performance applications—like real-time systems or high-throughput backends—Rust offers predictable, blazing-fast performance with excellent memory control.”

For more performance tips and benchmarks, check out this article on Medium.


2. Ease of Learning and Developer Experience

Python: Simplicity and Speed of Development

Python’s syntax is often described as “executable pseudocode.” It’s a favorite for beginners due to its clarity and concise nature. The vast ecosystem of libraries—think Django, Flask, Pandas, and TensorFlow—allows for rapid prototyping.

Python Code for Quick Prototyping

import math

def calculate_pi(iterations=5):
    a, b, t, p = 1.0, 1.0/math.sqrt(2), 1.0/4.0, 1.0
    for _ in range(iterations):
        a, b, t, p = (a+b)/2, math.sqrt(a*b), t - p*(a - (a+b)/2)**2, 2*p
    return (a+b)**2 / (4*t)

print(f"Calculated π: {calculate_pi()}")
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Rust: A Steeper but Rewarding Journey

Rust’s learning curve is steeper because it forces you to think about memory safety from the start. Concepts like ownership, borrowing, and lifetimes may seem challenging, but they lead to fewer runtime errors and more robust code.

Rust Code Illustrating Ownership

fn main() {
    let s1 = String::from("hello");
    let s2 = s1;  // s1 is moved to s2
    // println!("{}", s1); // This would cause a compile-time error
    println!("s2: {}", s2);
}
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info:

“Learning Rust is like learning to ride a bike with training wheels—you might struggle at first, but once you get it, you’ll enjoy a smoother, crash-free ride.”

For more detailed Rust learning resources, visit the official Rust Book and explore community discussions on Rust Users Forum.


3. Memory Management & Safety: Rust’s Killer Feature

Rust eliminates the need for a garbage collector by enforcing strict compile-time checks through its ownership model. This results in:

  • Zero Runtime Overhead: No pauses for garbage collection.
  • Compile-Time Safety: Errors such as dangling pointers or data races are caught early.
  • Predictable Performance: Efficient resource management for critical applications.

info:

“Rust’s ownership and borrowing rules ensure that your applications are not only fast but also incredibly safe from many common programming pitfalls.”

Python’s garbage collector simplifies development but can introduce latency—noticeable in high-performance or real-time applications.


4. Use Cases: Matching the Tool to the Task

Backend Development

  • Python: Ideal for web development and quick prototypes. Frameworks like Django and Flask let you build robust web applications rapidly.
  • Rust: Excels in building high-performance, scalable backends and microservices where control over system resources is essential.

Backend Example: Simple Web Server in Rust (Using Actix-web)

use actix_web::{get, App, HttpServer, Responder};

#[get("/")]
async fn index() -> impl Responder {
    "Hello, Rust-powered backend!"
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| App::new().service(index))
        .bind("127.0.0.1:8080")?
        .run()
        .await
}
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CLI Tools and Utilities

Rust’s ability to compile into small, efficient binaries makes it perfect for command-line tools that need to run on multiple platforms without additional dependencies.

Machine Learning & Data Science

  • Python: Dominates due to libraries like NumPy, Pandas, Scikit-Learn, and TensorFlow. It’s the industry standard for data analysis and model prototyping.
  • Rust: Making inroads for performance-critical components and data processing pipelines. Libraries like Polars (a fast DataFrame library) and integration with frameworks like PyTorch (using pyo3) are examples.

Rust with PyO3: Calling a Rust Function from Python

// Rust: lib.rs
use pyo3::prelude::*;
#[pyfunction]
fn add(a: f64, b: f64) -> PyResult<f64> {
    Ok(a + b)
}

#[pymodule]
fn mymodule(py: Python, m: &PyModule) -> PyResult<()> {
    m.add_function(wrap_pyfunction!(add, m)?)?;
    Ok(())
}
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You can then build a Python extension module from this Rust code.


5. Additional Resources and Tools

For more detailed discussions, benchmarks, and code examples, check out these resources:

info:

“Bookmark python.0x3d.site for all your Python development needs—from resources and trending discussions to curated articles and tools.”


6. Conclusion: Choose What’s Right for You

There’s no one-size-fits-all solution:

  • Rust is unbeatable for performance-critical, memory-sensitive applications where safety and concurrency are paramount.
  • Python remains the ideal choice for rapid development, data science, and projects that benefit from a vast ecosystem and ease of use.

Take Action:

  • New to coding or need rapid prototyping? Give Python a try and leverage its extensive libraries to get your project off the ground quickly.
  • Working on a performance-intensive project? Invest in learning Rust—the steeper learning curve pays off in reliability and speed.

Both languages have their bright futures, and using them in tandem (e.g., integrating Rust for performance-critical components in a Python project) is a strategy embraced by many forward-thinking developers.

Happy coding, and may your projects run fast and error-free!


For more tips, tutorials, and community discussions on Python, visit Python Developer Resources - Made by 0x3d.site. Embrace the best of both worlds and build projects that truly stand out!


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Top comments (8)

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keyru_nasirusman profile image
keyr_syntax • Edited

Comparing High level interpreted language (Python) against low level compiled language (RUST) is unfair for me. Python had already lost the game before the competition started. The fair comparison would have been Python against its friends (JavaScript or PHP) and RUST against C++ or Zig.

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yellowhatpro profile image
Ashu Aswal

I'd say it's fine if we're comparing 2 general purpose languages. Both can be used for a variety of stuff. As long as performance is one of the metric, and not the basis of the whole conversation, the comparison still feels valid to me.

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adic_threex profile image
adic threex

Rust isn't only low level language. You can write high level code with lot of abstraction.

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mikeainoz profile image
Mike Allen

I'd like to see a Python vs. Julia comparison. They are very similar in profile.

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resource_bunk_1077cab07da profile image
Resource Bunk

I'll do this on next articles.

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keyru_nasirusman profile image
keyr_syntax

I can't wait to see those "fair" comparisons.

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razielanarki profile image
Raziel Anarki

the first example uses buffered reads in rust while the python example reads the full file. this not only skews the memory usage comparison, but also affects performance.
(hint: use 'rb' as the file mode)

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rajesh_patel profile image
Rajesh Patel

Great comparison! Python’s simplicity and vast ecosystem make it a go-to for rapid development, while Rust’s performance and memory safety are game-changers for system-level programming. Curious—did you find any scenario where Python outperformed Rust in unexpected ways?

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