Comment by eigenvalue

I do think it would be very useful to have an online tool that lets you paste in your requirements.txt and then tells you which of the libraries have been recently verified to work properly with PyPy without a lot of additional fuss.

Also, you might want to flag the libraries that technically "work" but still require an extremely long and involved build process. For example, I recently started the process of installing Pandas with pip in a PyPy venv and it was stuck on `Getting requirements to build wheel ...` for a very long time, like 20+ minutes.