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There are no syscalls or equivalent operating system calls in the code paths measured. The architecture is also independent of the operating system, with exceptions in some languages for the calling convention (not in rust, afaik, or at least rust makes no guarantees there.)

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However, in practice Rust's calling convention does actually depend on the operating system. So on Linux Rust will make use of the stack red zone, while on Windows it doesn't. (Also some codegen in LLVM depends on the operating system)

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