cntimer ⏱

Automatic execution time and memory tracker for Python scripts.

No code changes. No config. Just pip install cntimer — every script you run will automatically show timing and memory at the end, whether you use VSCode, terminal, or any Python runner.

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Install

pip install cntimer

That's it. Every Python script you run will show this automatically:

────────────────────────────────────────────────────────────
  🕐 Time      0.74 ms        (execution: 1.44 s)
  📦 Memory    31.2 MB       (peak: 62.4 MB)
────────────────────────────────────────────────────────────

✅ Works in base Python, virtual environments (venv), conda, and pipx — no extra steps needed.

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How it works

cntimer places a cntimer.pth file into your Python's site-packages directory. Python automatically reads all .pth files on every startup — which is what makes tracking work with zero code changes.

When you uninstall with pip uninstall cntimer, the .pth hook removes itself automatically on the next Python startup — no orphaned files, no errors.

• ✅ Works with VSCode Run button
• ✅ Works in terminal
• ✅ Works in virtual environments (venv, conda, pipx)
• ✅ Works on Windows (x86, x64, ARM64), macOS, Linux
• ✅ No imports needed in your code
• ✅ Cleans up after itself on uninstall

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Output explained

Field	Meaning
🕐 Time	CPU time — actual computation (excludes sleep, I/O, network wait)
execution	Total execution time (how long you waited)
📦 Memory	Memory still in use when script finished
peak	Highest memory used at any point during execution

If Time is much bigger than cpu, your script spent time waiting (file I/O, network, sleep).
If they're close, your script is CPU-bound (pure computation).

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Manual install (if auto-install failed)

Find your site-packages path:

# Mac / Linux
python3 -c "import site; print(site.getsitepackages()[0])"

# Windows
python -c "import site; print(site.getsitepackages()[0])"

Then copy the file:

macOS

cp cntimer.pth $(python3 -c "import site; print(site.getsitepackages()[0])")/cntimer.pth

Linux

sudo cp cntimer.pth $(python3 -c "import site; print(site.getsitepackages()[0])")/cntimer.pth

Windows 64-bit / ARM64 — run Command Prompt as Administrator

copy cntimer.pth "C:\Program Files\Python3xx\Lib\site-packages\cntimer.pth"

Windows 32-bit — run Command Prompt as Administrator

copy cntimer.pth "C:\Program Files (x86)\Python3xx\Lib\site-packages\cntimer.pth"

Replace 3xx with your Python version (e.g. 312 for Python 3.12).

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Uninstall

pip uninstall cntimer

The .pth hook removes itself automatically on the next Python startup. No manual cleanup needed.

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License

MIT © 2026 tokitahmidtoufa