Chrome Slow to Resolve /etc/hosts on macOS / OS X

I had the same issue in Chrome 64.0.3282.167 on macOS High Sierra (10.13.3) and this StackOverflow answer solved it for me:

https://stackoverflow.com/a/10200111/318359

Quote:

Put all your hosts file entries for localhost into one line like so:

127.0.0.1 localhost myproject.dev myotherproject.dev 
::1 localhost

Have you tried running dtruss on chrome to see what it is doing when it hangs?

https://opensourcehacker.com/2011/12/02/osx-strace-equivalent-dtruss-seeing-inside-applications-what-they-do-and-why-they-hang/