nsjail VS python-sandbox-wasm

So what's the difference between nsjail[1] and bubblewrap[2]?

[1] https://github.com/google/nsjail

I am currently working on a code execution engine (also written in Rust) which uses nsjail for sandboxing and gnu time for measuring time and memory usage under the hood. You can run arbitrary code simply using a rest api and there is also a client library for Rust. It can already run C++, Rust and Python (and a few other languages) while allowing you to specify multiple source files, environment variables, command line arguments, standard input and resource limits (e.g. time, memory, maximum number of processes and whether network access is allowed or not). After running the program, the engine reports exit codes, outputs (stdout and stderr) and the amount of resources the program used.

I've not yet figured out the incantations I need to actually do this - in particular the limits on CPU and memory time.

I posed this question on Mastodon recently and Jim Kring put together this demo, which gets most of the way there (albeit using an old Python 3.6 build): https://github.com/jimkring/python-sandbox-wasm

It doesn't feel like this should be as hard to figure out as it is!