use std::mem::size_of;
use test::Bencher;
use rand;
use rand::distributions::exponential::Exp;
use rand::distributions::Sample;

#[bench]
fn rand_exp(b: &mut Bencher) {
    let mut rng = rand::weak_rng();
    let mut exp = Exp::new(2.71828 * 3.14159);

    b.iter(|| {
        for _ in 0..::RAND_BENCH_N {
            exp.sample(&mut rng);
        }
    });
    b.bytes = size_of::<f64>() as u64 * ::RAND_BENCH_N;
}