1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// Copyright 2019 Developers of the Rand project.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(test)]
extern crate test;
use test::Bencher;
use rand::Rng;
use rand::distributions::WeightedIndex;
#[bench]
fn weighted_index_creation(b: &mut Bencher) {
let mut rng = rand::thread_rng();
let weights = [1u32, 2, 4, 0, 5, 1, 7, 1, 2, 3, 4, 5, 6, 7];
b.iter(|| {
let distr = WeightedIndex::new(weights.to_vec()).unwrap();
rng.sample(distr)
})
}
#[bench]
fn weighted_index_modification(b: &mut Bencher) {
let mut rng = rand::thread_rng();
let weights = [1u32, 2, 3, 0, 5, 6, 7, 1, 2, 3, 4, 5, 6, 7];
let mut distr = WeightedIndex::new(weights.to_vec()).unwrap();
b.iter(|| {
distr.update_weights(&[(2, &4), (5, &1)]).unwrap();
rng.sample(&distr)
})
}
|
