Over the last couple of days, my internet connection has become borderline unusable. Between 50% and 75% of my page requests stall before DNS is resolved. This only effects my Mac workstation (uses 18.104.22.168) but not my phone (google dns). It effects all browsers, and was not helped by restarting or cache cleaning or other maintenance routines.
Results from Speedtest.net are interesting. It’s hard to get the site to load at all (takes several attempts and a couple of minutes). But once it loads, it works fine, and shows very low latency and fast throughput.
I just switched the machine to google dns servers and the problem disappeared.
This slowdown started yesterday (5/25/2018) sometime in the morning. I’d been using Cloudflare dns since the first week it was introduced without any problems.