Implementing convenience APIs in Rust has been tricky, since a lot of the usual memory-safety semantics start to break once you push into fast concurrent code that shares buffers across threads. My early drafts were riddled with unsafe and barely functional, so I’d definitely welcome suggestions for quality-of-life improvements.

I was asked this a few months back but don’t have the measurements fresh anymore. In general, I think TBB is one of the more thorough and feature-rich parallelism libraries out there. That said, I just found a comparable usage example in my benchmarks, and it doesn’t look like TBB will have the same low-latency profile as Fork Union: https://github.com/ashvardanian/ParallelReductionsBenchmark/...