When I install opencv-python-headless in Google Colab, it takes 15 minutes to complete. My code: ! pip install --upgrade pip ! pip install opencv-python-headless Here's a notebook with this code which recreates the problem: https://colab.research.google.com/g.../slow-install-of-opencv-python-headless.ipynb. The process eventually completes, but I'd like to reduce the time to install. I saw from `Building wheel for opencv-python (PEP 517) ... -` runs forever a discussion about compiling OpenCV, which could very well be what is happening here. However, this same SO post states that if you upgrade pip, it will use pre-built wheels. Edit: Added @intsco's workaround to the Google Colab Continue reading...
