12-06-2019
Network conditions change constantly.
If you create an algorithm to select the fastest VPN host at time = T0, it is highly possible a few minutes later that same selection, which appeared optimal at time = T0, will be much slower than it was before at time = T0 + "not too many seconds later"; especially when you are on a public network shared by many people.
You have no control over when someone else who shares the same host decides to upload or download a huge file. You have no control over others who might also be trying to "optimize" like you, on a shared public network.
The architecture, android, arch x86_64, etc are not relevant because the issue is not under the control of your architecture on shared public networks.
Sounds like you have not done much network management or Internet system design work before.....
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NETWORKS(5) BSD File Formats Manual NETWORKS(5)
NAME
networks -- network name data base
DESCRIPTION
The networks file contains information regarding the known networks which comprise the DARPA Internet. For each network a single line should
be present with the following information:
official network name
network number
aliases
Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of
the line are not interpreted by routines which search the file. This file is normally created from the official network data base maintained
at the Network Information Control Center (NIC), though local changes may be required to bring it up to date regarding unofficial aliases
and/or unknown networks.
Network number may be specified in the conventional ``.'' (dot) notation using the inet_network(3) routine from the Internet address manipu-
lation library, inet(3). Network names may contain any printable character other than a field delimiter, newline, or comment character.
INTERACTION WITH DIRECTORY SERVICES
Processes generally find network records using one of the getnetent(3) family of functions. On Mac OS X, these functions interact with the
DirectoryService(8) daemon, which reads the /etc/networks file as well as searching other directory information services to determine network
name and address information.
FILES
/etc/networks
SEE ALSO
getnetent(3), DirectoryService(8)
HISTORY
The networks file format appeared in 4.2BSD.
4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution