ndarray 0.15.6

#![feature(test)]
#![allow(
    clippy::many_single_char_names,
    clippy::deref_addrof,
    clippy::unreadable_literal,
    clippy::many_single_char_names
)]
extern crate test;
use test::Bencher;

use ndarray::prelude::*;

#[bench]
fn default_f64(bench: &mut Bencher) {
    bench.iter(|| Array::<f64, _>::default((128, 128)))
}

#[bench]
fn zeros_f64(bench: &mut Bencher) {
    bench.iter(|| Array::<f64, _>::zeros((128, 128)))
}

#[bench]
fn map_regular(bench: &mut test::Bencher) {
    let a = Array::linspace(0., 127., 128).into_shape((8, 16)).unwrap();
    bench.iter(|| a.map(|&x| 2. * x));
}

#[bench]
fn map_stride(bench: &mut test::Bencher) {
    let a = Array::linspace(0., 127., 256).into_shape((8, 32)).unwrap();
    let av = a.slice(s![.., ..;2]);
    bench.iter(|| av.map(|&x| 2. * x));
}