I didn't, thanks. I think that there are use-cases in which java is more performant than his low-performance options, and can be as performant as his high-perf

I didn't, thanks. I think that there are use-cases in which java is more performant than his low-performance options, and can be as performant as his high-performance options, while providing a much larger ecosystem. I think the parent poster actually makes a very weird set of choices - "when my high level choice, python, is not cutting the mustard, I am happy to throw away breadth of support entirely in the name of optimisation." It's up to him what his preferences are, of course, I'm not saying they're wrong as much as personal.