[sveme]

I'd guess the ad-hoc simulation of the structure is computationally quite expensive and takes a while, though that's just a guess and I haven't read the original paper yet.

[ricksunny]

In fact a cost of $1-$4 for the preferred implementation:

https://news.ycombinator.com/item?id=27894060

The colab provides a slightly-less-accurate version that operates in the cloud. For the real mccoy it seems one must set up one’s own environment and leverage the git repo.