On 01/27/2018 11:42 AM, Matt wrote:
Godbolt link: https://godbolt.org/g/t5S976

Careful with these comparisons guys. Know what you are looking at.
Rust does not eliminate setting the framepointer register, and so it looks "bad" [1]. Clang also sets the framepointer for macOS ABI regardless of optimization level.
https://godbolt.org/g/eeo81n

[1] See https://github.com/rust-lang/rust/pull/47152

-Johan

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