optimizing jj -l @this

[pkoppstein]

I've successfully used jj to "splat" a very large top-level by running:

jj -l @this

This is very fast but consumes a large amount of memory: for my 1GB file, it requires 5GB RAM, even though each top-level array item is very small.

I was wondering whether there is another way to "splat" a top-level array that would (ignoring overhead) essentially require only as much memory as the largest item in the array, while still being reasonably fast.

If not, could the presence of the -l flag be taken into account when optimizing the use of memory?