my_bench.rs

#[macro_use]
extern crate criterion;

use std::collections::HashMap;

use criterion::Criterion;

enum Operation {
    Print(&'static str),
    MakeLabel(usize),
    MakeJump(usize),
}

fn sort_labels(hashmap: &mut HashMap<usize, usize>, operations: Vec<Operation>) {
    for (index, value) in operations.iter().enumerate() {
        match value {
            Operation::MakeLabel(label_id) => {
                hashmap.insert(*label_id, index);
            }
            _operation => {}
        };
    }
}

fn f() -> u64 {
    let operations = vec![
        Operation::Print("Hello"), // Print использует &'static str
        Operation::MakeLabel(0),
        Operation::MakeJump(1),
        Operation::Print("Не напечатается"),
        Operation::MakeLabel(1),
        Operation::Print("Мы здесь :)"),
    ];
    let mut map: HashMap<usize, usize> = HashMap::new();
    sort_labels(&mut map, operations);
    map.len() as _
}

fn criterion_benchmark(c: &mut Criterion) {
    c.bench_function("sort labels", |b| b.iter(|| f()));
}

criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);

stdout.txt

 c bench
    Finished release [optimized] target(s) in 0.09s
     Running target/release/deps/criterion_test-b6d4e6c476bc742b

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

     Running target/release/deps/my_benchmark-a2c6c11db5814243
Gnuplot not found, disabling plotting
sort labels             time:   [137.35 ns 140.80 ns 144.49 ns]                        
                        change: [+14.748% +17.124% +19.501%] (p = 0.00 < 0.05)
                        Performance has regressed.
Found 16 outliers among 100 measurements (16.00%)
  12 (12.00%) high mild
  4 (4.00%) high severe

Gnuplot not found, disabling plotting