What's the preferred way of creating a large RleMatrix?
The documentation page ?RleMatrix only covers how make an RleMatrix from a single Rle (which doesn't work for very large RleMatrix objects)
First creating a normal matrix and then coercing to RleMatrix, requires keeping the original matrix in memory which is not possible.
I'm currently using the approach of first creating a DataFrame of Rle's, and then coercing that to an RleMatrix, but that seems a bit slow. Is there a smarter way?