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use criterion::{criterion_group, criterion_main, Criterion};
use std::hint::black_box;
fn run_benches(c: &mut Criterion) {
let large_image = black_box(std::fs::read("benches/large.png").unwrap());
let small_image = black_box(std::fs::read("benches/small.png").unwrap());
let mut group = c.benchmark_group("large-image");
group.sample_size(50);
group.bench_function("tiny-png", |b| {
b.iter(|| {
let mut png = &large_image[..];
let header = tiny_png::read_png_header(&mut png).unwrap();
let mut buf = vec![0; header.required_bytes()];
let data = tiny_png::read_png(&mut png, Some(&header), &mut buf).unwrap();
std::hint::black_box(data);
})
});
group.bench_function("png", |b| {
b.iter(|| {
let png = &large_image[..];
let decoder = png::Decoder::new(png);
let mut reader = decoder.read_info().unwrap();
let mut png_buf = vec![0; reader.output_buffer_size()];
reader.next_frame(&mut png_buf).unwrap();
std::hint::black_box(png_buf);
})
});
group.finish();
let mut group = c.benchmark_group("small-image");
group.sample_size(1000);
group.bench_function("tiny-png", |b| {
b.iter(|| {
let mut png = &small_image[..];
let header = tiny_png::read_png_header(&mut png).unwrap();
let mut buf = vec![0; header.required_bytes()];
let data = tiny_png::read_png(&mut png, Some(&header), &mut buf).unwrap();
std::hint::black_box(data);
})
});
group.bench_function("png", |b| {
b.iter(|| {
let png = &small_image[..];
let decoder = png::Decoder::new(png);
let mut reader = decoder.read_info().unwrap();
let mut png_buf = vec![0; reader.output_buffer_size()];
reader.next_frame(&mut png_buf).unwrap();
std::hint::black_box(png_buf);
})
});
group.finish();
}
criterion_group!(benches, run_benches);
criterion_main!(benches);
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