code class="language-bash">$ cargo bench
   Compiling adder v0.0.1 (file:///home/steve/tmp/adder)
     Running target/release/adder-91b3e234d4ed382a

running 2 tests
test tests::it_works ... ignored
test tests::bench_add_two ... bench:         1 ns/iter (+/- 0)

test result: ok. 0 passed; 0 failed; 1 ignored; 1 measured
</code></pre>

<!-- Our non-benchmark test was ignored. You may have noticed that `cargo bench` -->

<!-- takes a bit longer than `cargo test`. This is because Rust runs our benchmark -->

<