50 lines
1.7 KiB
Rust
50 lines
1.7 KiB
Rust
//! See how `rust-decimal` performs compared to native floating numbers.
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use criterion::{
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black_box, criterion_group, criterion_main, measurement::Measurement, BenchmarkGroup, BenchmarkId, Criterion,
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};
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use rust_decimal::Decimal;
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const DECIMAL_2_01: Decimal = Decimal::from_parts(201, 0, 0, false, 2);
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const DECIMAL_13_7: Decimal = Decimal::from_parts(137, 0, 0, false, 1);
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const F64_2_01: f64 = 2.01;
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const F64_13_7: f64 = 13.7;
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macro_rules! add_benchmark_group {
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($criterion:expr, $f:ident, $op:tt) => {
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fn $f<M, const N: usize>(group: &mut BenchmarkGroup<'_, M>)
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where
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M: Measurement,
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{
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group.bench_with_input(BenchmarkId::new("f64 (diff)", N), &N, |ben, _| {
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ben.iter(|| black_box(F64_2_01 $op F64_13_7))
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});
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group.bench_with_input(BenchmarkId::new("f64 (equal)", N), &N, |ben, _| {
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ben.iter(|| black_box(F64_2_01 $op F64_2_01))
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});
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group.bench_with_input(BenchmarkId::new("rust-decimal (diff)", N), &N, |ben, _| {
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ben.iter(|| black_box(DECIMAL_2_01 $op DECIMAL_13_7))
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});
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group.bench_with_input(BenchmarkId::new("rust-decimal (equal)", N), &N, |ben, _| {
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ben.iter(|| black_box(DECIMAL_2_01 $op DECIMAL_2_01))
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});
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}
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let mut group = $criterion.benchmark_group(stringify!($f));
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$f::<_, 100>(&mut group);
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group.finish();
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};
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}
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fn criterion_benchmark(c: &mut Criterion) {
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add_benchmark_group!(c, addition, +);
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add_benchmark_group!(c, division, /);
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add_benchmark_group!(c, multiplication, *);
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add_benchmark_group!(c, subtraction, -);
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}
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criterion_group!(benches, criterion_benchmark);
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criterion_main!(benches);
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