Large file support

[Nowosad]

The mapshaper library supports large files (https://github.com/mbloch/mapshaper) by changing the memory limit. Is it possible in rmapshaper?

[ateucher]

This is something I would really like to enable, but that is a feature of Node.js, not mapshaper specifically. rmapshaper uses the V8 R package to run the mapshaper javascript library in R. Node is built on V8.

I opened an issue about this, but it doesn't look like it's easy (certainly beyond my C++ abilities). I think it's further complicated by the fact that the V8 R package necessarily relies on an older version of libv8. Not to mention that rmapshaper seems to be the only use case (at least so far) that runs into these limits.

[Nowosad]

Thanks for the explanation and your great work @ateucher!