See which imports are slowing startup.
Section: Async, Web, and Production Troubleshooting
Profile import time
bash
bash
python -X importtime app.pyLearn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Async, Web, and Production Troubleshooting
Enable debug mode programmatically
Turn on event loop debugging in code.
Start a simple HTTP server for quick testing
Serve files locally to reproduce client behavior.
Dump stack traces for all threads
Useful when an app appears hung or deadlocked.