When browsing a localhost website, such as VS Development Webserver Cassini, with Chrome, requests are processed very slowly.
This behavior is caused by DNS localhost IPv4 vs IPv6 settings. In the hosts file (C:\Windows\System32\drivers\etc) there is by default two commented lines;
# 127.0.0.1 localhost
# ::1 localhost
Uncomment the first one and Chrome will process localhost request at normal speed.