Pre-RFC: crate creator rate limiting in docs.rs

[ckaran]

I posted this in the other thread, but in case people aren't looking at the other thread:

Docs.rs build prioritization

OK, I looked at the documentation for docs.rs, and it looks like each crate is built within its own docker image. So this actually gives us a really simple procedure for dealing with the issue that allows us to reweight the relative performance of each build on the fly: On start up, use docker update -c to set the CPU share to 8. (see this article for an explanation of the CPU share option). For every 15 minutes of runtime of a given container, decrease the container's CPU share by 1, to a m…