arrow/benches/mutable_array.rs

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// distributed with this work for additional information
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// to you under the Apache License, Version 2.0 (the
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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 rand::Rng;

extern crate arrow;

use arrow::util::test_util::seedable_rng;
use arrow::{array::*, util::bench_util::create_string_array};

fn create_slices(size: usize) -> Vec<(usize, usize)> {
    let rng = &mut seedable_rng();

    (0..size)
        .map(|_| {
            let start = rng.gen_range(0, size / 2);
            let end = rng.gen_range(start + 1, size);
            (start, end)
        })
        .collect()
}

fn bench<T: Array>(v1: &T, slices: &[(usize, usize)]) {
    let mut mutable = MutableArrayData::new(vec![v1.data_ref()], false, 5);
    for (start, end) in slices {
        mutable.extend(0, *start, *end)
    }
    mutable.freeze();
}

fn add_benchmark(c: &mut Criterion) {
    let v1 = create_string_array::<i32>(1024, 0.0);
    let v2 = create_slices(1024);
    c.bench_function("mutable str 1024", |b| b.iter(|| bench(&v1, &v2)));

    let v1 = create_string_array::<i32>(1024, 0.5);
    let v2 = create_slices(1024);
    c.bench_function("mutable str nulls 1024", |b| b.iter(|| bench(&v1, &v2)));
}

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