I've seen suggestions that #[cfg(bench)] or #[cfg(test)] will conditionally compile items for benchmarks, but they haven't been activating for me when I try, either with cargo bench or cargo test --benches. Which profile gets used when compiling for a benchmark?

Conditional compilation for benchmarks

kornel August 12, 2020, 9:38pm 2

External tests/ and benches/ always get a non-test version of the library.

cfg(test) takes effect only for tests in the library itself.

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