The n-body looks most like canonical JS to me. It’s a small array, but’s it’s accessed many times.
Unfortunately the c++ version is simd optimized, so I don’t think that’s a fair comparison.
https://benchmarksgame-team.pages.debian.net/benchmarksgame/...
If the JIT detects the array as homogenous it will compile it to low level array access. JS JITs are very good.
Shouldn't simd use make it less likely JS would be within magnitude, so if compared against simd programs and the JS is still less than 10x slower then that strengthens jampekka's point?