Curious about /etc/installurl

[hitest]

I was reading the man page for /etc/installurl. As stated the file is created during installation. I appreciate that the file created is a Canadian mirror and syspatch works out of the box after installation. I am curious. Does the installer pick a mirror that is geographically closer to you? Or does the installer always default to the Canadian mirror? Very happy with OpenBSD 6.4; it is first rate!

bsd$ man installurl
INSTALLURL(5)                 File Formats Manual                INSTALLURL(5)

NAME
     installurl - OpenBSD mirror server location

DESCRIPTION
     The /etc/installurl file contains a single line specifying an OpenBSD
     mirror server URL, such as

           https://cdn.openbsd.org/pub/OpenBSD

     It is created by the installer script during installations and upgrades
     over HTTP.

     Empty lines and lines beginning with `#' in the file are ignored.

FILES
     /etc/installurl

SEE ALSO
     pkg_add(1), syspatch(8)

OpenBSD 6.4                     August 23, 2018                    OpenBSD 6.4
bsd$