Why does PDM behave extremely slow when I add a source (when trying to install CPU PyTorch) ?

[rishacha]

I'm using this solution

The config below works but causes pdm add/remove to work very slowly for some reason.

[[tool.pdm.source]]
type = "find_links"
url = "https://download.pytorch.org/whl/cpu/torch_stable.html"
name = "torch"
include_packages = ["torch*"]

How do I resolve this? Is this normal behaviour? Is there a better solution?