Heroku can run
Web Dynos
and
Worker Dynos
so that Web Dynos take care of routes
and worker Worker Dynos take care of processing works.
Since there is a unit of Dyno,
It seems using Node.js cluster module is meaningless to me on Heroku.
Because Node.js cluster module is to use all cores of server CPU
and Dyno seems virtual unit of CPU core to me.
Am I right? Or is it still worth to run a node.js app with cluster module?