[h4l]

Thanks! That's right, it's pure Python. It's certainly a lot slower than C or Rust, but I've not done any benchmarking to get a good sense. I believe Deno have a Rust implementation which they use, so in principle a Python binding could make use of that. I think V8's own C++ implementation is too integrated with V8 itself to be re-usable, at least without refactoring.

My immediate use case is very IO-bound, and won't use huge message sizes, so decoding/encoding performance probably isn't a huge problem. My hunch is It should be fast enough for event handling small messages, or it'd also be fine for passing binary buffers between Python and JS. (E.g using an array library like numpy and shipping an array over as a buffer, with some other JS objects for extra metadata.) (More so if I implemented reading/writing an mmap.)