arrow2 0.6.1

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//
//   http://www.apache.org/licenses/LICENSE-2.0
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// under the License.

#[macro_use]
extern crate criterion;
use criterion::Criterion;

use arrow2::compute::sort::{lexsort, sort, sort_to_indices, SortColumn, SortOptions};
use arrow2::util::bench_util::*;
use arrow2::{array::*, datatypes::*};

fn bench_lexsort(arr_a: &dyn Array, array_b: &dyn Array) {
    let columns = vec![
        SortColumn {
            values: arr_a,
            options: None,
        },
        SortColumn {
            values: array_b,
            options: None,
        },
    ];

    criterion::black_box(lexsort::<u32>(&columns, None).unwrap());
}

fn bench_sort(arr_a: &dyn Array) {
    sort(criterion::black_box(arr_a), &SortOptions::default(), None).unwrap();
}

fn bench_sort_limit(arr_a: &dyn Array) {
    let _: PrimitiveArray<u32> = sort_to_indices(
        criterion::black_box(arr_a),
        &SortOptions::default(),
        Some(100),
    )
    .unwrap();
}

fn add_benchmark(c: &mut Criterion) {
    (10..=20).step_by(2).for_each(|log2_size| {
        let size = 2usize.pow(log2_size);
        let arr_a = create_primitive_array::<f32>(size, DataType::Float32, 0.0);

        c.bench_function(&format!("sort 2^{} f32", log2_size), |b| {
            b.iter(|| bench_sort(&arr_a))
        });

        c.bench_function(&format!("sort-limit 2^{} f32", log2_size), |b| {
            b.iter(|| bench_sort_limit(&arr_a))
        });

        let arr_b = create_primitive_array_with_seed::<f32>(size, DataType::Float32, 0.0, 43);
        c.bench_function(&format!("lexsort 2^{} f32", log2_size), |b| {
            b.iter(|| bench_lexsort(&arr_a, &arr_b))
        });

        let arr_a = create_primitive_array::<f32>(size, DataType::Float32, 0.5);

        c.bench_function(&format!("sort null 2^{} f32", log2_size), |b| {
            b.iter(|| bench_sort(&arr_a))
        });

        let arr_b = create_primitive_array_with_seed::<f32>(size, DataType::Float32, 0.5, 43);
        c.bench_function(&format!("lexsort null 2^{} f32", log2_size), |b| {
            b.iter(|| bench_lexsort(&arr_a, &arr_b))
        });

        let arr_a = create_string_array::<i32>(size, 4, 0.1, 42);
        c.bench_function(&format!("sort utf8 null 2^{}", log2_size), |b| {
            b.iter(|| bench_sort(&arr_a))
        });
    });
}

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