How would you debug slow Python code?

How would you debug slow Python code in a production-minded way?

Expected Answer

Measure first, isolate the bottleneck, inspect algorithmic complexity, then optimize the smallest proven hotspot.

Detailed Explanation

Senior answers avoid guessing. Mention profiling, data size, I/O, database calls, and algorithmic complexity.

Common Follow-up Questions

• What tool would you profile with?
• How do you avoid premature optimization?