Add benchmark for Min

This commit is contained in:
Vinzent Steinberg 2017-05-24 18:58:34 +02:00
parent b371d3e8bc
commit 12c3fd76d1
2 changed files with 45 additions and 0 deletions

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@ -20,3 +20,7 @@ streaming-stats = "0.1"
[[bench]]
name = "average"
harness = false
[[bench]]
name = "min"
harness = false

41
benches/min.rs Normal file
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@ -0,0 +1,41 @@
#[macro_use] extern crate bencher;
extern crate rand;
extern crate average;
extern crate stats;
use bencher::Bencher;
/// Create a random vector of random floats in [0, 1].
fn initialize_vec() -> Vec<f64> {
use rand::distributions::{Range, IndependentSample};
use rand::{XorShiftRng, SeedableRng};
let range = Range::new(0.0, 1.0);
let n = 1_000_000;
let mut values = Vec::with_capacity(n);
let mut rng = XorShiftRng::from_seed([1, 2, 3, 4]);
for _ in 0..n {
values.push(range.ind_sample(&mut rng));
}
values
}
fn bench_average(b: &mut Bencher) {
let values = initialize_vec();
b.iter(|| {
let a: average::Min = values.iter().map(|x| *x).collect();
a
});
}
fn bench_iter(b: &mut Bencher) {
let values = initialize_vec();
b.iter(|| {
let mut it = values.iter();
let init: f64 = *it.next().unwrap();
it.fold(init, |a, &b| a.min(b))
});
}
benchmark_group!(benches, bench_average, bench_iter);
benchmark_main!(benches);