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-rw-r--r--third_party/rust/zip/benches/read_entry.rs43
1 files changed, 43 insertions, 0 deletions
diff --git a/third_party/rust/zip/benches/read_entry.rs b/third_party/rust/zip/benches/read_entry.rs
new file mode 100644
index 0000000000..af9affe319
--- /dev/null
+++ b/third_party/rust/zip/benches/read_entry.rs
@@ -0,0 +1,43 @@
+use bencher::{benchmark_group, benchmark_main};
+
+use std::io::{Cursor, Read, Write};
+
+use bencher::Bencher;
+use getrandom::getrandom;
+use zip::{ZipArchive, ZipWriter};
+
+fn generate_random_archive(size: usize) -> Vec<u8> {
+ let data = Vec::new();
+ let mut writer = ZipWriter::new(Cursor::new(data));
+ let options =
+ zip::write::FileOptions::default().compression_method(zip::CompressionMethod::Stored);
+
+ writer.start_file("random.dat", options).unwrap();
+ let mut bytes = vec![0u8; size];
+ getrandom(&mut bytes).unwrap();
+ writer.write_all(&bytes).unwrap();
+
+ writer.finish().unwrap().into_inner()
+}
+
+fn read_entry(bench: &mut Bencher) {
+ let size = 1024 * 1024;
+ let bytes = generate_random_archive(size);
+ let mut archive = ZipArchive::new(Cursor::new(bytes.as_slice())).unwrap();
+
+ bench.iter(|| {
+ let mut file = archive.by_name("random.dat").unwrap();
+ let mut buf = [0u8; 1024];
+ loop {
+ let n = file.read(&mut buf).unwrap();
+ if n == 0 {
+ break;
+ }
+ }
+ });
+
+ bench.bytes = size as u64;
+}
+
+benchmark_group!(benches, read_entry);
+benchmark_main!(benches);