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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
extern crate arrayvec;
#[macro_use] extern crate bencher;
use arrayvec::ArrayString;
use bencher::Bencher;
fn try_push_c(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
b.iter(|| {
v.clear();
while v.try_push('c').is_ok() {
}
v.len()
});
b.bytes = v.capacity() as u64;
}
fn try_push_alpha(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
b.iter(|| {
v.clear();
while v.try_push('α').is_ok() {
}
v.len()
});
b.bytes = v.capacity() as u64;
}
// Yes, pushing a string char-by-char is slow. Use .push_str.
fn try_push_string(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
let input = "abcαβγ“”";
b.iter(|| {
v.clear();
for ch in input.chars().cycle() {
if !v.try_push(ch).is_ok() {
break;
}
}
v.len()
});
b.bytes = v.capacity() as u64;
}
fn push_c(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
b.iter(|| {
v.clear();
while !v.is_full() {
v.push('c');
}
v.len()
});
b.bytes = v.capacity() as u64;
}
fn push_alpha(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
b.iter(|| {
v.clear();
while !v.is_full() {
v.push('α');
}
v.len()
});
b.bytes = v.capacity() as u64;
}
fn push_string(b: &mut Bencher) {
let mut v = ArrayString::<512>::new();
let input = "abcαβγ“”";
b.iter(|| {
v.clear();
for ch in input.chars().cycle() {
if !v.is_full() {
v.push(ch);
} else {
break;
}
}
v.len()
});
b.bytes = v.capacity() as u64;
}
benchmark_group!(benches, try_push_c, try_push_alpha, try_push_string, push_c,
push_alpha, push_string);
benchmark_main!(benches);
|
