dtourolle
77a1925bac
The crate as crates.io publishes it, minus .cargo-ok, its Cargo.lock and data/testdata (13 MB of sample files only its own tests read). Not yet routed through [patch.crates-io]; the next commit is the patch.
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
use criterion::{Criterion, criterion_group, criterion_main};
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use rawler::ljpeg92::LjpegCompressor;
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use std::hint::black_box;
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fn generate_data(w: usize, h: usize, ncomp: usize) -> Vec<u16> {
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let mut img = vec![0; w * h * ncomp];
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for (i, pix) in img.iter_mut().enumerate() {
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*pix = i as u16 % 4u16;
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}
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img
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}
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fn encode_ljpeg(img: &[u16], w: usize, h: usize, ncomp: usize) {
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let pred = 1;
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let bps = 16;
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let state = LjpegCompressor::new(img, w, h, ncomp, bps, pred, 0, 0).unwrap();
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let _result = state.encode().unwrap();
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}
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fn copy_data(img: &[u16], w: usize, h: usize) {
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let mut result = vec![0; w * h];
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for (dst, src) in result.chunks_exact_mut(w).zip(img.chunks_exact(w)) {
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dst.copy_from_slice(src);
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}
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}
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fn criterion_benchmark(c: &mut Criterion) {
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let mut group = c.benchmark_group("ljpeg-encoder");
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// Configure Criterion.rs to detect smaller differences and increase sample size to improve
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// precision and counteract the resulting noise.
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group.significance_level(0.1).sample_size(20); //.measurement_time(Duration::from_secs(10));
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let x = generate_data(3000, 2000, 1);
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group.bench_with_input("encode_3000x2000", &x, |b, data| {
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b.iter(|| encode_ljpeg(black_box(data), black_box(3000), black_box(2000), black_box(1)))
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});
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group.bench_with_input("copy_3000x2000", &x, |b, data| {
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b.iter(|| copy_data(black_box(data), black_box(3000), black_box(2000)))
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});
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group.finish();
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}
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criterion_group!(benches, criterion_benchmark);
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criterion_main!(benches);
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