Why the decision to use C++ instead of NodeJS?
The main limitation on a server capacity is CPU
Re:Agar.io
by tomsmeding on Thursday April 30, 2015 @11:02AM
(#9465468)
Probably speed.
Think that part of it is that only one process or thread can run at any given time in node. So, if you have a complicated multiplayer server, subroutines will start getting blocked.
See my reply to madeofpalk for the other 2 answers.