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//! Benchmark for JPEG parsing performance
use criterion::{black_box, criterion_group, criterion_main, Criterion};
use geek_szitman_supercamera::protocol::jpeg::JpegParser;
// Sample JPEG data for benchmarking
const SAMPLE_JPEG: &[u8] = &[
0xFF, 0xD8, // SOI
0xFF, 0xE0, // APP0
0x00, 0x10, // Length
0x4A, 0x46, 0x49, 0x46, 0x00, // "JFIF\0"
0x01, 0x01, // Version
0x00, // Units
0x00, 0x01, // Density
0x00, 0x01, 0x00, 0x00, // No thumbnail
0xFF, 0xC0, // SOF0
0x00, 0x0B, // Length
0x08, // Precision
0x00, 0x40, // Height (64)
0x00, 0x40, // Width (64)
0x03, // Components
0x01, 0x11, 0x00, // Y component
0x02, 0x11, 0x01, // U component
0x03, 0x11, 0x01, // V component
0xFF, 0xD9, // EOI
];
fn benchmark_jpeg_parsing(c: &mut Criterion) {
let parser = JpegParser::new();
c.bench_function("parse_jpeg_dimensions", |b| {
b.iter(|| parser.parse_dimensions(black_box(SAMPLE_JPEG)))
});
c.bench_function("parse_jpeg_metadata", |b| {
b.iter(|| parser.parse_metadata(black_box(SAMPLE_JPEG)))
});
c.bench_function("validate_jpeg", |b| {
b.iter(|| parser.validate_jpeg(black_box(SAMPLE_JPEG)))
});
}
fn benchmark_jpeg_parser_creation(c: &mut Criterion) {
c.bench_function("create_jpeg_parser", |b| b.iter(|| JpegParser::new()));
c.bench_function("create_jpeg_parser_with_debug", |b| {
b.iter(|| JpegParser::new_with_debug(true))
});
}
criterion_group!(
benches,
benchmark_jpeg_parsing,
benchmark_jpeg_parser_creation
);
criterion_main!(benches);
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