About the microsoft loopback adapter settings

In the minisap setup process, when I use the recommended loopback setting and change the ip to 10.10.0.10 and also change the host file.

But If I do this , it's really slow for my minisap to run~~~

So I just change the ip to local host (127.0.0.1)again, then the minisap run much faster?

Would anyone give me some sugestions about how this happened?