Noob question, why the default Download server in Software & Updates is United States when my location is Singapore?
Furthermore, when I click "Other" and attempt to "Select the best server", I am almost always pointed to a US server, or sometimes a European one, but never an Asian one (and there are actually a few in Singapore).
Many thanks!
It depends on the network speed. To check the speed of mirrors yourself, you can run
curl -s http://mirrors.ubuntu.com/mirrors.txt | xargs -n1 -I {} sh -c 'echo `curl -r 0-102400 -s -w %{speed_download} -o /dev/null {}/ls-lR.gz` {}' |sort -g -r
This command is taken from @Kandy's answer https://askubuntu.com/a/719551/1107236