1 files changed, 109 insertions, 0 deletions
diff --git a/third_party/rust/adler/benches/bench.rs b/third_party/rust/adler/benches/bench.rs
new file mode 100644
index 0000000000..0969f59483
--- /dev/null
+++ b/third_party/rust/adler/benches/bench.rs
@@ -0,0 +1,109 @@
+extern crate adler;
+extern crate criterion;
+
+use adler::{adler32_slice, Adler32};
+use criterion::{criterion_group, criterion_main, Criterion, Throughput};
+
+fn simple(c: &mut Criterion) {
+    {
+        const SIZE: usize = 100;
+
+        let mut group = c.benchmark_group("simple-100b");
+        group.throughput(Throughput::Bytes(SIZE as u64));
+        group.bench_function("zeroes-100", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0; SIZE]);
+            });
+        });
+        group.bench_function("ones-100", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0xff; SIZE]);
+            });
+        });
+    }
+
+    {
+        const SIZE: usize = 1024;
+
+        let mut group = c.benchmark_group("simple-1k");
+        group.throughput(Throughput::Bytes(SIZE as u64));
+
+        group.bench_function("zeroes-1k", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0; SIZE]);
+            });
+        });
+
+        group.bench_function("ones-1k", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0xff; SIZE]);
+            });
+        });
+    }
+
+    {
+        const SIZE: usize = 1024 * 1024;
+
+        let mut group = c.benchmark_group("simple-1m");
+        group.throughput(Throughput::Bytes(SIZE as u64));
+        group.bench_function("zeroes-1m", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0; SIZE]);
+            });
+        });
+
+        group.bench_function("ones-1m", |bencher| {
+            bencher.iter(|| {
+                adler32_slice(&[0xff; SIZE]);
+            });
+        });
+    }
+}
+
+fn chunked(c: &mut Criterion) {
+    const SIZE: usize = 16 * 1024 * 1024;
+
+    let data = vec![0xAB; SIZE];
+
+    let mut group = c.benchmark_group("chunked-16m");
+    group.throughput(Throughput::Bytes(SIZE as u64));
+    group.bench_function("5552", |bencher| {
+        bencher.iter(|| {
+            let mut h = Adler32::new();
+            for chunk in data.chunks(5552) {
+                h.write_slice(chunk);
+            }
+            h.checksum()
+        });
+    });
+    group.bench_function("8k", |bencher| {
+        bencher.iter(|| {
+            let mut h = Adler32::new();
+            for chunk in data.chunks(8 * 1024) {
+                h.write_slice(chunk);
+            }
+            h.checksum()
+        });
+    });
+    group.bench_function("64k", |bencher| {
+        bencher.iter(|| {
+            let mut h = Adler32::new();
+            for chunk in data.chunks(64 * 1024) {
+                h.write_slice(chunk);
+            }
+            h.checksum()
+        });
+    });
+    group.bench_function("1m", |bencher| {
+        bencher.iter(|| {
+            let mut h = Adler32::new();
+            for chunk in data.chunks(1024 * 1024) {
+                h.write_slice(chunk);
+            }
+            h.checksum()
+        });
+    });
+}
+
+criterion_group!(benches, simple, chunked);
+criterion_main!(benches);