1 | #![feature (test)] |
2 | |
3 | extern crate test; |
4 | |
5 | use rand::prelude::*; |
6 | use test::Bencher; |
7 | use wyhash::WyRng; |
8 | |
9 | #[bench] |
10 | fn shuffle_wyhash(b: &mut Bencher) { |
11 | let mut rng = WyRng::from_rng(thread_rng()).unwrap(); |
12 | let mut x = (0..100).collect::<Vec<usize>>(); |
13 | b.iter(|| { |
14 | x.shuffle(&mut rng); |
15 | x[0] |
16 | }) |
17 | } |
18 | |
19 | #[bench] |
20 | fn shuffle_fastrand(b: &mut Bencher) { |
21 | let mut rng = fastrand::Rng::new(); |
22 | let mut x = (0..100).collect::<Vec<usize>>(); |
23 | b.iter(|| { |
24 | rng.shuffle(&mut x); |
25 | x[0] |
26 | }) |
27 | } |
28 | |
29 | #[bench] |
30 | fn u8_wyhash(b: &mut Bencher) { |
31 | let mut rng = WyRng::from_rng(thread_rng()).unwrap(); |
32 | b.iter(|| { |
33 | let mut sum = 0u8; |
34 | for _ in 0..10_000 { |
35 | sum = sum.wrapping_add(rng.gen::<u8>()); |
36 | } |
37 | sum |
38 | }) |
39 | } |
40 | |
41 | #[bench] |
42 | fn u8_fastrand(b: &mut Bencher) { |
43 | let mut rng = fastrand::Rng::new(); |
44 | b.iter(|| { |
45 | let mut sum = 0u8; |
46 | for _ in 0..10_000 { |
47 | sum = sum.wrapping_add(rng.u8(..)); |
48 | } |
49 | sum |
50 | }) |
51 | } |
52 | |
53 | #[bench] |
54 | fn u32_wyhash(b: &mut Bencher) { |
55 | let mut rng = WyRng::from_rng(thread_rng()).unwrap(); |
56 | b.iter(|| { |
57 | let mut sum = 0u32; |
58 | for _ in 0..10_000 { |
59 | sum = sum.wrapping_add(rng.gen::<u32>()); |
60 | } |
61 | sum |
62 | }) |
63 | } |
64 | |
65 | #[bench] |
66 | fn u32_fastrand(b: &mut Bencher) { |
67 | let mut rng = fastrand::Rng::new(); |
68 | b.iter(|| { |
69 | let mut sum = 0u32; |
70 | for _ in 0..10_000 { |
71 | sum = sum.wrapping_add(rng.u32(..)); |
72 | } |
73 | sum |
74 | }) |
75 | } |
76 | |
77 | #[bench] |
78 | fn fill(b: &mut Bencher) { |
79 | let mut rng = fastrand::Rng::new(); |
80 | b.iter(|| { |
81 | // Pick a size that isn't divisble by 8. |
82 | let mut bytes = [0u8; 367]; |
83 | rng.fill(&mut bytes); |
84 | bytes |
85 | }) |
86 | } |
87 | |
88 | #[bench] |
89 | fn fill_naive(b: &mut Bencher) { |
90 | let mut rng = fastrand::Rng::new(); |
91 | b.iter(|| { |
92 | let mut bytes = [0u8; 367]; |
93 | for item in &mut bytes { |
94 | *item = rng.u8(..); |
95 | } |
96 | bytes |
97 | }) |
98 | } |
99 | |