Python Debugging Cheat Sheet/Profile a script with cProfile

Collect function-level runtime statistics.

Section: Profiling and Memory

Profile a script with cProfile

bash
bash
python -m cProfile app.py

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Surface slow functions first.
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Profile code inside Python
Wrap a hot path in cProfile and print stats.
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Track memory allocations with tracemalloc
Capture memory allocation snapshots.
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Inspect process memory and CPU with psutil
Check runtime resource usage from inside the process.
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Insert a built-in breakpoint
Pause execution and enter the configured debugger.
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Dump the active exception traceback in an except block.