Each open page consumes one core.
Running a Server
You'll need simple-httpd and cache-table.el from
skewer-mode. Then run Emacs in batch mode and visit
http://localhost:8080/ (determined by
emacs -batch -Q -L skewer-mode/ -L simple-httpd/ -l key-collab.el \ -f key-collab-batch
Notice: Emacs' batch mode is broken in Windows, so you'll need to drop the first argument when running the server on that platform.