Running Node.js App with cluster module is meaningless in Heroku?

Question

Heroku can run

Web Dynos

and

Worker Dynos

so that Web Dynos take care of routes

and worker W

Answer 1

I've found that it actually worth to use cluster module

because each dyno has 4 CPU cores.

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Reference: http://www.quora.com/Heroku/How-powerful-is-one-Heroku-dyno