MacOS Sierra massive slowdown in Java networking

I upgraded to MacOS Sierra, and have really been enjoying the shared clipboard. I haven’t really noticed any other new features that impact my day to day development, however I would advise Java developers to avoid it for the near future. I have searched and searched and I wasn’t coming up with any results. Then I found this blog post. This is definitely part of the problem. I made the host file changes and got a slight boost, but not enough to explain the whole thing.