bench.rs

#![feature(test)]

extern crate test;

use test::Bencher;

#[bench]
fn array_stack(b: &mut Bencher) {
    const LENGTH: usize = 10_000;

    b.iter(|| {
        let mut a: [i32; LENGTH] = [0; LENGTH];
        for j in 0..LENGTH {
            for i in 0..LENGTH {
                a[i] = j as i32;
            }
        }

        a
    });
}

#[bench]
fn array_heap(b: &mut Bencher) {
    const LENGTH: usize = 10_000;

    b.iter(|| {
        let mut a: Box<[i32; LENGTH]> = Box::new([0; LENGTH]);
        for j in 0..LENGTH {
            for i in 0..LENGTH {
                a[i] = j as i32;
            }
        }

        a
    });
}


#[bench]
fn vec_heap(b: &mut Bencher) {
    const LENGTH: usize = 10_000;

    b.iter(|| {
        let mut a: Vec<i32> = vec![0; LENGTH];
        for j in 0..LENGTH {
            for i in 0..LENGTH {
                a[i] = j as i32;
            }
        }

        a
    });
}