arrow-array/benches/decimal_overflow.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
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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use arrow_array::builder::{Decimal128Builder, Decimal256Builder};
use arrow_buffer::i256;
use criterion::*;
use std::hint;

fn criterion_benchmark(c: &mut Criterion) {
    let len = 8192;
    let mut builder_128 = Decimal128Builder::with_capacity(len);
    let mut builder_256 = Decimal256Builder::with_capacity(len);
    for i in 0..len {
        if i % 10 == 0 {
            builder_128.append_value(i128::MAX);
            builder_256.append_value(i256::from_i128(i128::MAX));
        } else {
            builder_128.append_value(i as i128);
            builder_256.append_value(i256::from_i128(i as i128));
        }
    }
    let array_128 = builder_128.finish();
    let array_256 = builder_256.finish();

    c.bench_function("validate_decimal_precision_128", |b| {
        b.iter(|| hint::black_box(array_128.validate_decimal_precision(8)));
    });
    c.bench_function("null_if_overflow_precision_128", |b| {
        b.iter(|| hint::black_box(array_128.null_if_overflow_precision(8)));
    });
    c.bench_function("validate_decimal_precision_256", |b| {
        b.iter(|| hint::black_box(array_256.validate_decimal_precision(8)));
    });
    c.bench_function("null_if_overflow_precision_256", |b| {
        b.iter(|| hint::black_box(array_256.null_if_overflow_precision(8)));
    });
}

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