The async code I wrote that was slower than the synchronous version

📰 Medium · Python

Learn how async code can be slower than synchronous versions and understand the nuances of concurrency in Python

intermediate Published 21 May 2026
Action Steps
  1. Write a simple async batch job in Python to test performance
  2. Compare the execution time of async and synchronous versions of the same task
  3. Analyze the results to identify potential bottlenecks in the async code
  4. Apply synchronization primitives to avoid race conditions and improve performance
  5. Test and refine the async code to achieve optimal performance
Who Needs to Know This

Developers and software engineers working with Python can benefit from understanding the limitations of async code to optimize their batch jobs and concurrent systems

Key Insight

💡 Concurrency solves different problems than just speeding up code execution

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Async code isn't always faster! Learn how to optimize your Python batch jobs and avoid common concurrency pitfalls

Key Takeaways

Learn how async code can be slower than synchronous versions and understand the nuances of concurrency in Python

Full Article

A production batch job taught me that concurrency solves different problems than I thought it did. Continue reading on Python in Plain English »
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