1 files changed, 25 insertions, 0 deletions
diff --git a/third_party/rust/png/benches/decoder.rs b/third_party/rust/png/benches/decoder.rs
new file mode 100644
index 0000000000..7d9cce933c
--- /dev/null
+++ b/third_party/rust/png/benches/decoder.rs
@@ -0,0 +1,25 @@
+#![cfg(feature = "benchmarks")]
+#![feature(test)]
+
+extern crate png;
+extern crate test;
+
+use std::fs::File;
+use std::io::Read;
+
+use png::Decoder;
+
+#[bench]
+fn bench_big(b: &mut test::Bencher) {
+    let mut data = Vec::new();
+    File::open("tests/pngsuite/PngSuite.png").unwrap().read_to_end(&mut data).unwrap();
+    let decoder = Decoder::new(&*data);
+    let (info, _) = decoder.read_info().unwrap();
+    let mut image = vec![0; info.buffer_size()];
+    b.iter(|| {
+        let decoder = Decoder::new(&*data);
+        let (_, mut decoder) = decoder.read_info().unwrap();
+        test::black_box(decoder.next_frame(&mut image)).unwrap();
+    });
+    b.bytes = info.buffer_size() as u64
+}