torch-cluster very slow to install

[richardrl]

Collecting torch-cluster==1.5.6
  Downloading torch_cluster-1.5.6.tar.gz (36 kB)
Building wheels for collected packages: torch-cluster
  Building wheel for torch-cluster (setup.py) ... -\ddone
  Created wheel for torch-cluster: filename=torch_cluster-1.5.6-cp36-cp36m-linux_x86_64.whl size=21218475 sha256=bac4341a1627abf29db300b65a004fc595a57f6472a33dc9540e8b8349681e6a
  Stored in directory: /home/richard/.cache/pip/wheels/89/f5/9b/4291b611b04abdb3e7e04c5b36088aaf26b9baa378720a1394
Successfully built torch-cluster

The above process takes 30 minutes (installing torch-cluster from pip install -r requirements.txt)

why? how can i make it much faster?

[rusty1s]

You can install from binaries, see here. If this does not work for you, you may want to add the --no-index option to the pip install call.