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2c00a5a8 XL |
1 | |
2 | extern crate arrayvec; | |
3 | #[macro_use] extern crate bencher; | |
4 | ||
f035d41b XL |
5 | use std::io::Write; |
6 | ||
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7 | use arrayvec::ArrayVec; |
8 | ||
9 | use bencher::Bencher; | |
f035d41b | 10 | use bencher::black_box; |
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11 | |
12 | fn extend_with_constant(b: &mut Bencher) { | |
13 | let mut v = ArrayVec::<[u8; 512]>::new(); | |
14 | let cap = v.capacity(); | |
15 | b.iter(|| { | |
16 | v.clear(); | |
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17 | let constant = black_box(1); |
18 | v.extend((0..cap).map(move |_| constant)); | |
19 | v[511] | |
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20 | }); |
21 | b.bytes = v.capacity() as u64; | |
22 | } | |
23 | ||
24 | fn extend_with_range(b: &mut Bencher) { | |
25 | let mut v = ArrayVec::<[u8; 512]>::new(); | |
26 | let cap = v.capacity(); | |
27 | b.iter(|| { | |
28 | v.clear(); | |
f035d41b XL |
29 | let range = 0..cap; |
30 | v.extend(range.map(|x| black_box(x as _))); | |
31 | v[511] | |
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32 | }); |
33 | b.bytes = v.capacity() as u64; | |
34 | } | |
35 | ||
36 | fn extend_with_slice(b: &mut Bencher) { | |
37 | let mut v = ArrayVec::<[u8; 512]>::new(); | |
38 | let data = [1; 512]; | |
39 | b.iter(|| { | |
40 | v.clear(); | |
f035d41b XL |
41 | let iter = data.iter().map(|&x| x); |
42 | v.extend(iter); | |
43 | v[511] | |
44 | }); | |
45 | b.bytes = v.capacity() as u64; | |
46 | } | |
47 | ||
48 | fn extend_with_write(b: &mut Bencher) { | |
49 | let mut v = ArrayVec::<[u8; 512]>::new(); | |
50 | let data = [1; 512]; | |
51 | b.iter(|| { | |
52 | v.clear(); | |
53 | v.write(&data[..]).ok(); | |
54 | v[511] | |
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55 | }); |
56 | b.bytes = v.capacity() as u64; | |
57 | } | |
58 | ||
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59 | fn extend_from_slice(b: &mut Bencher) { |
60 | let mut v = ArrayVec::<[u8; 512]>::new(); | |
61 | let data = [1; 512]; | |
62 | b.iter(|| { | |
63 | v.clear(); | |
64 | v.try_extend_from_slice(&data).ok(); | |
65 | v[511] | |
66 | }); | |
67 | b.bytes = v.capacity() as u64; | |
68 | } | |
69 | ||
70 | benchmark_group!(benches, | |
71 | extend_with_constant, | |
72 | extend_with_range, | |
73 | extend_with_slice, | |
74 | extend_with_write, | |
75 | extend_from_slice | |
76 | ); | |
77 | ||
2c00a5a8 | 78 | benchmark_main!(benches); |