I'm using google's artifact registry -- aside from upload speed another thing that kills me is freakin download speed ... Why in the world should it take 2 minutes to download a 2.6 GB layer to a cloud build instance sitting in the same region as the artifact registry ... Stupidly slow networking really harms the stateless ci machine + docker registry cache which actually would be quite cool if it was fast enough ...

In my case it's still faster than doing the builds would be -- but I'm definitely gonna have to get machines with persistent local cache in the mix at some point so that these operations will finish within a few seconds instead of a few minutes ...