Windows OS: HOSTS file
0.0.0.0 vs. 127.0.0.1
Using 0.0.0.0 instead of 127.0.0.1 is indeed faster because you don't have to wait for a timeout. It also does not interfere if you are running a web server on the local PC.
If you use 0.0.0.0, you may want to add this entry just before your first 0.0.0.0 "blocking" entry: