niofis

That's correct, as the nim's generated C code is not idiomatic.

Yeah, I've meant to update it and add more language implementations, but haven't really got the time. Might as well do so soon as almost all compilers/interpreters have new versions which I suspect have many nice optimizations.

Did some testing and found that it boils down to three things: RNG algorithm used in the standard library, forced use of double precision floating point numbers (the case for OCaml and javascript), and like you mentioned, memory management.

EDIT: forgot to mention the obvious things: compiler/interpreter maturity and inherent overhead.

This seems like a nice improvement, could you send a PR for it?

It got me thinking as well, so I ventured and did some experiments on this, and found that the main difference is the algorithm used for the RNG; C's std lib uses a slower one (which also is thread safe, and butchered OpenMP performance). You can take a look at a more apples to apples comparison in the latest update for crb.c which uses a xor128 rng; rust is still a little faster (especially when going multithreaded), but not quite the difference in the README file, still need to get some time to update it.

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