850x Faster PostgreSQL Writes With One Line of Python

📰 Dev.to · abdu masah

Speed up PostgreSQL writes by 850x with a single line of Python code using executemany() with the right parameters

intermediate Published 26 Apr 2026
Action Steps
  1. Import the psycopg2 library to connect to PostgreSQL from Python
  2. Use the executemany() function with the 'batch_size' parameter to optimize write performance
  3. Test the performance difference by comparing execution times with and without batch_size
  4. Apply this optimization to your existing data loading scripts to achieve significant speedups
  5. Monitor and adjust the batch_size parameter for optimal performance with your specific dataset
Who Needs to Know This

Data engineers and developers who work with large datasets in PostgreSQL can benefit from this optimization to improve write performance

Key Insight

💡 Using executemany() with the right parameters can drastically improve write performance in PostgreSQL

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💡 Speed up PostgreSQL writes by 850x with one line of Python! #PostgreSQL #Python

Key Takeaways

Speed up PostgreSQL writes by 850x with a single line of Python code using executemany() with the right parameters

Full Article

Every Python developer loading data into PostgreSQL hits the same wall. executemany() with 1M...
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