Node.js servers are very efficient concerning I/O and large number of client connection. But why is node.js not suitable for heavy CPU apps in comparison to a traditional mu
You can have a look at this package, the-computer, which may help you do some cpu intensive works in a single instance of node.js app in a simple way.
Definitely it is not as effective as raw c++ libs, but it can cover most general computing cases, keeping you in node.js garden while allowing you leverage the cores of the cup.