[DoofusOfDeath]

I once prototyped an acoustic ray-tracer in MLTon, and it was a pleasure to work in.

I have no idea how close I could have gotten to C/C++ -level performance, but I found debugging the prototype to go way faster in MLTon than it likely would have gone in C/C++.

[mcguire]

Unrelated, but...

Acoustic ray-tracer? That sounds like fun. Is there anywhere I can learn more?

[DoofusOfDeath]

Here's one place: http://oalib.hlsresearch.com/Rays/

If you want to actually understand it, this book is pretty good IIRC: https://www.amazon.com/Computational-Acoustics-Modern-Signal...