Checking the mirror region allows you to manually specify a specific mirror.

[Seele0oO]

describe the request

This download speed is already the speed that can be achieved after configuring the appropriate region's mirror.
but in general it may be that a slower mirror is used during the installation process, and I would like to be able to manually specify the mirror server to effectively reduce the download time used.For areas where network quality is not guaranteed.

[CelestifyX]

The problem is also that if you install Arch via archinstall, for the first 5-7 seconds you will think about something, for example, if you install a package (pacman -S firefox) you will think a little, and then the installation will begin, but if you install Arch manually, everything is fine