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I love when C gets to use non standard freestanding extensions, Rust a no std, is game on, yet when other languages do similar approaches, it doesn't count, it isn't the same language.

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I think part of the complaint has less to do with language toolchains/extensions and more that the post processing performed on the C# output via Binaryen is not unique to the toolchain. It's analogous to comparing the toolchain outputs while zipping one output but not the other.

I think it's also a bit unclear exactly what you mean when you list nonstandard C extensions alongside Rust's no_std and then say "similar approaches". Rust's no_std is part of the language proper so the commonality surely can't be the non-standard-ness of what is done to shrink binary sizes.

In both cases, you cannot simply take a random ISO C, ISO C++ or Rust crates code and hope it will work without a single code change in such environment.

IIRC no_std is a per-crate attribute and does not actually forbid use of std, so I think there's a decent chance you can use random Rust crates without changing them.

That being said, I do think it would have been nice if the author had chosen a more interesting benchmark, but alas...

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