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Can Python Handle 1 Billion Loops? Here’s What Happens

Shantun Parmar
Python in Plain English
3 min readJan 10, 2025

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Can Python Handle 1 Billion Loops? Here’s What Happens
Created By Author

If you’ve ever wanted to know how Python works at playing big as in 1 billion steps, you’re not alone. So, I tried this myself and see if Python can really deal with such a huge thing. So simple an explanation of what I did and how it went when I ran 1 billion times in Python.

Why I Decided to Test 1 Billion Loops

When I started reading about how massively long tasks are dealt with programming languages, I got curious. While Python is easy to use, what about 1 billion loops? Would the program even run or would it crash? I wanted to find out.

The Python Code I Used

I wrote a simple Python script that run 1 billion times. Nothing happens inside the loop. All I was trying to do was see how long it would take. Here’s the code:

# Start a timer
import time
start_time = time.time()

# Run 1 billion loops
for i in range(1_000_000_000):
pass # Do nothing, just loop

# Stop the timer and show the time it took
end_time = time.time()
print(f"Time taken for 1 billion loops: {end_time - start_time} seconds")

What Does the Code Do?

  • Inside the forloop we have the 0 to 999,999,999 (1 billion).
  • Within the loop, the passstatement does nothing. We just run the loop and see how long it takes.
  • The timemodule looks after how long our program will take to run.

What Happened When I Ran the Code?

The results surprised me. On my computer, it took several seconds to do the 1 billion loops. It will depend on how your computer performs, though overall, python isn’t going to create any issues.

Why Does It Take Time?

Python can handle 1 billion loops, but for the ‘fastest’ job Python isn’t the best language for the job. The time it takes depends on several factors:

  • Horribly, but if it’s inside the loop and more complex, you will have more time on the task.
  • The computer’s performance (faster computers complete the task quicker).

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Published in Python in Plain English

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Written by Shantun Parmar

Software Engineer and Full Stack Developer specializing in Python & JavaScript | Link : https://www.linkedin.com/in/shantun-parmar/

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