rust-average/benches/min.rs

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#![cfg_attr(feature = "cargo-clippy", allow(float_cmp, map_clone))]
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#[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> {
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use rand::distributions::{Range, Distribution};
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use rand::{XorShiftRng, SeedableRng};
let range = Range::new(0.0, 1.0);
let n = 1_000_000;
let mut values = Vec::with_capacity(n);
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let mut rng = XorShiftRng::from_seed(
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
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for _ in 0..n {
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values.push(range.sample(&mut rng));
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}
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);