Well the fastest C# entry for n-body looks like a translation of the C/C++ versions. It is a meaningful result that the primitives of the language allow for it to hang in that company. The absence of a Java version using numerics is unfortunate, that'd be a nice addition.

A lot of the coding style seems optimized around copy-pasting the C code, e.g. trying to alias the Vector methods (Vector256.Create) to their instruction name (_mm256_set1_pd). That makes the code non-idiomatic, but it also doesn't really help performance, just makes the porting easier.

The F# example is on the same runtime and a better view of using the numerics directly. As a trade-off of performance, memory, and code complexity it is actually a pretty solid balance, which I wouldn't have expected.

https://benchmarksgame-team.pages.debian.net/benchmarksgame/...