NodeBB use virtualDom??
The numbers listed in the pricing page is actually out of date. They were measured using NodeBB v0.5.0
v0.6.x and beyond support much higher concurrent user loads, so we'll be updating these numbers to reflect the increased scalability.
NodeBB is the way to go. I use CoreOS with my own Docker packages (NodeBB + MongoDB)
Site isn't breaking a sweat even with the five fold bigger load than normal busy days. We are really impressed.
Added: Suggestion: cookie "loggedin" when the visitor is logged in (and deleting the same cookie when visitor is logged out)
thanks Xinbenlv, I came across some similar errors and fixed it