[flippant]

I wonder how well the GC could handle the constant generation of new collections.

[alediaferia]

Yeah, that's my concern as well.

I don't think I'll put much effort in this project since this is barely a proof of concept but there's a couple of points I would like to dig if I ever find time:

1. How to reduce collections generations?

2. How to take advantage of the machine cores to execute the Map/Reduce operations?