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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
extern crate criterion;
use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion};
use image::ExtendedColorType;
use image::{codecs::bmp::BmpEncoder, codecs::jpeg::JpegEncoder, ColorType};
use std::fs::File;
use std::io::{BufWriter, Seek, SeekFrom, Write};
trait Encoder {
fn encode_raw(&self, into: &mut Vec<u8>, im: &[u8], dims: u32, color: ExtendedColorType);
fn encode_bufvec(&self, into: &mut Vec<u8>, im: &[u8], dims: u32, color: ExtendedColorType);
fn encode_file(&self, file: &File, im: &[u8], dims: u32, color: ExtendedColorType);
}
#[derive(Clone, Copy)]
struct BenchDef {
with: &'static dyn Encoder,
name: &'static str,
sizes: &'static [u32],
colors: &'static [ColorType],
}
fn encode_all(c: &mut Criterion) {
const BENCH_DEFS: &[BenchDef] = &[
BenchDef {
with: &Bmp,
name: "bmp",
sizes: &[100u32, 200, 400],
colors: &[ColorType::L8, ColorType::Rgb8, ColorType::Rgba8],
},
BenchDef {
with: &Jpeg,
name: "jpeg",
sizes: &[64u32, 128, 256],
colors: &[ColorType::L8, ColorType::Rgb8, ColorType::Rgba8],
},
];
for definition in BENCH_DEFS {
encode_definition(c, definition);
}
}
criterion_group!(benches, encode_all);
criterion_main!(benches);
type BenchGroup<'a> = criterion::BenchmarkGroup<'a, criterion::measurement::WallTime>;
/// Benchmarks encoding a zeroed image.
///
/// For compressed formats this is surely not representative of encoding a normal image but it's a
/// start for benchmarking.
fn encode_zeroed(group: &mut BenchGroup, with: &dyn Encoder, size: u32, color: ExtendedColorType) {
let im = vec![0; (color.bits_per_pixel() as usize * size as usize).div_ceil(8) * size as usize];
group.bench_with_input(
BenchmarkId::new(format!("zero-{color:?}-rawvec"), size),
&im,
|b, image| {
let mut v = vec![];
with.encode_raw(&mut v, &im, size, color);
b.iter(|| with.encode_raw(&mut v, image, size, color));
},
);
group.bench_with_input(
BenchmarkId::new(format!("zero-{color:?}-bufvec"), size),
&im,
|b, image| {
let mut v = vec![];
with.encode_raw(&mut v, &im, size, color);
b.iter(|| with.encode_bufvec(&mut v, image, size, color));
},
);
group.bench_with_input(
BenchmarkId::new(format!("zero-{color:?}-file"), size),
&im,
|b, image| {
let file = File::create("temp.bmp").unwrap();
b.iter(|| with.encode_file(&file, image, size, color));
},
);
}
fn encode_definition(criterion: &mut Criterion, def: &BenchDef) {
let mut group = criterion.benchmark_group(format!("encode-{}", def.name));
for &color in def.colors {
for &size in def.sizes {
encode_zeroed(&mut group, def.with, size, color.into());
}
}
}
struct Bmp;
struct Jpeg;
trait EncoderBase {
fn encode(&self, into: impl Write, im: &[u8], dims: u32, color: ExtendedColorType);
}
impl<T: EncoderBase> Encoder for T {
fn encode_raw(&self, into: &mut Vec<u8>, im: &[u8], dims: u32, color: ExtendedColorType) {
into.clear();
self.encode(into, im, dims, color);
}
fn encode_bufvec(&self, into: &mut Vec<u8>, im: &[u8], dims: u32, color: ExtendedColorType) {
into.clear();
let buf = BufWriter::new(into);
self.encode(buf, im, dims, color);
}
fn encode_file(&self, mut file: &File, im: &[u8], dims: u32, color: ExtendedColorType) {
file.seek(SeekFrom::Start(0)).unwrap();
let buf = BufWriter::new(file);
self.encode(buf, im, dims, color);
}
}
impl EncoderBase for Bmp {
fn encode(&self, mut into: impl Write, im: &[u8], size: u32, color: ExtendedColorType) {
let mut x = BmpEncoder::new(&mut into);
x.encode(im, size, size, color).unwrap();
}
}
impl EncoderBase for Jpeg {
fn encode(&self, mut into: impl Write, im: &[u8], size: u32, color: ExtendedColorType) {
let mut x = JpegEncoder::new(&mut into);
x.encode(im, size, size, color).unwrap();
}
}
|
