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-rw-r--r--third_party/rust/zip/benches/read_metadata.rs38
1 files changed, 38 insertions, 0 deletions
diff --git a/third_party/rust/zip/benches/read_metadata.rs b/third_party/rust/zip/benches/read_metadata.rs
new file mode 100644
index 0000000000..95334b1c5a
--- /dev/null
+++ b/third_party/rust/zip/benches/read_metadata.rs
@@ -0,0 +1,38 @@
+use bencher::{benchmark_group, benchmark_main};
+
+use std::io::{Cursor, Write};
+
+use bencher::Bencher;
+use zip::{ZipArchive, ZipWriter};
+
+const FILE_COUNT: usize = 15_000;
+const FILE_SIZE: usize = 1024;
+
+fn generate_random_archive(count_files: usize, file_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);
+
+ let bytes = vec![0u8; file_size];
+
+ for i in 0..count_files {
+ let name = format!("file_deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef_{i}.dat");
+ writer.start_file(name, options).unwrap();
+ writer.write_all(&bytes).unwrap();
+ }
+
+ writer.finish().unwrap().into_inner()
+}
+
+fn read_metadata(bench: &mut Bencher) {
+ let bytes = generate_random_archive(FILE_COUNT, FILE_SIZE);
+
+ bench.iter(|| {
+ let archive = ZipArchive::new(Cursor::new(bytes.as_slice())).unwrap();
+ archive.len()
+ });
+}
+
+benchmark_group!(benches, read_metadata);
+benchmark_main!(benches);