i'm working with lot's of arrays and matrixes as datastructures in
JS. with the max message size limit, it's nice to use jitter matrixes.
i could spill them in and allocate them like that, but JS seems so
take function jit_matrix() as an input function.
how do i deal with it this way? can i copy it to a 2D array?
i'm not doing any image processing btw