use criterion::*;

fn calc_series_no_threads(n: u64) -> BigNum {
    // ...
}

fn calc_series_with_threads(n: u64) -> BigNum {
    // ...
}

fn calc_series_benchmark(c: &mut Criterion) {
    const SAMPLE_SIZE: usize = 10;
    let mut group = c.benchmark_group("calc series");
    let keypoints = (25..=200).step_by(25);

    for i in keypoints {
        group.bench_function(BenchmarkId::new("no threads", i), |b| {
            b.iter(|| calc_series_no_threads(i))
        });
        group.bench_function(BenchmarkId::new("with threads", i), |b| {
            b.iter(|| calc_series_with_threads(i))
        });
    }

    group.sample_size(SAMPLE_SIZE);
}

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