philiprehberger-import-profiler 0.1.4

Show how long each Python import takes during startup

philiprehberger-import-profiler

Show how long each Python import takes during startup.

Installation

pip install philiprehberger-import-profiler

Usage

from philiprehberger_import_profiler import profile_imports

report = profile_imports("my_package")

# Slowest imports
for entry in report.slowest(10):
    print(f"{entry.name}: {entry.duration_ms:.1f}ms")

# Tree view
report.print_tree(threshold_ms=5.0)
# └── my_package (124.5ms)
#     ├── requests (45.2ms)
#     │   └── urllib3 (22.1ms)
#     └── numpy (62.0ms)

# Summary
print(f"Total: {report.total_ms:.1f}ms, Modules: {report.module_count}")

# Export
data = report.to_dict()

API

• profile_imports(module_name) — Profile all imports, returns ImportReport
• report.slowest(n) — Top N slowest imports
• report.print_tree(threshold_ms=0) — Print indented tree
• report.total_ms — Total import time
• report.to_dict() — Export as list of dicts

Development

pip install -e .
python -m pytest tests/ -v

License

MIT