39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
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use std::fs;
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use criterion::{criterion_group, criterion_main, Criterion, Throughput};
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use png::Decoder;
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fn load_all(c: &mut Criterion) {
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for entry in fs::read_dir("tests/benches/").unwrap().flatten() {
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match entry.path().extension() {
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Some(st) if st == "png" => {}
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_ => continue,
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}
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let data = fs::read(entry.path()).unwrap();
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bench_file(c, data, entry.file_name().into_string().unwrap());
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}
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}
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criterion_group!(benches, load_all);
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criterion_main!(benches);
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fn bench_file(c: &mut Criterion, data: Vec<u8>, name: String) {
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let mut group = c.benchmark_group("decode");
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group.sample_size(20);
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let decoder = Decoder::new(&*data);
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let mut reader = decoder.read_info().unwrap();
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let mut image = vec![0; reader.output_buffer_size()];
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let info = reader.next_frame(&mut image).unwrap();
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group.throughput(Throughput::Bytes(info.buffer_size() as u64));
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group.bench_with_input(name, &data, |b, data| {
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b.iter(|| {
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let decoder = Decoder::new(data.as_slice());
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let mut decoder = decoder.read_info().unwrap();
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decoder.next_frame(&mut image).unwrap();
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})
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});
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}
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