diff --git a/implementations/rust/oo/Cargo.toml b/implementations/rust/oo/Cargo.toml
index 82ce8ce..f79194e 100644
--- a/implementations/rust/oo/Cargo.toml
+++ b/implementations/rust/oo/Cargo.toml
@@ -14,5 +14,12 @@ num-bigint = "0.4"
 num-traits = "0.2"
 regex = "1.5"
 
+[dev-dependencies]
+criterion = "0.3"
+
+[[bench]]
+name = "codec"
+harness = false
+
 [package.metadata.workspaces]
 independent = true
diff --git a/implementations/rust/oo/benches/.gitignore b/implementations/rust/oo/benches/.gitignore
new file mode 100644
index 0000000..800aca2
--- /dev/null
+++ b/implementations/rust/oo/benches/.gitignore
@@ -0,0 +1 @@
+testdata.bin
diff --git a/implementations/rust/oo/benches/codec.rs b/implementations/rust/oo/benches/codec.rs
new file mode 100644
index 0000000..f1055ae
--- /dev/null
+++ b/implementations/rust/oo/benches/codec.rs
@@ -0,0 +1,98 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use oo::BinarySource;
+use oo::BytesBinarySource;
+use oo::IOBinarySource;
+use oo::IOValueDomainCodec;
+use oo::IOValues;
+use oo::PackedWriter;
+use oo::Reader;
+use oo::Value;
+use oo::packed::annotated_iovalue_from_bytes;
+use std::fs::File;
+use std::io::Read;
+use std::io::Seek;
+use std::io;
+
+pub fn bench_decoder_bytes(c: &mut Criterion) {
+    let mut fh = File::open("../../../tests/samples.bin").unwrap();
+    let mut bs = vec![];
+    fh.read_to_end(&mut bs).ok();
+    c.bench_function("(oo) decode samples.bin via bytes", |b| b.iter_with_large_drop(
+        || annotated_iovalue_from_bytes(&bs[..]).unwrap()));
+}
+
+pub fn bench_decoder_file(c: &mut Criterion) {
+    let mut fh = File::open("../../../tests/samples.bin").unwrap();
+    c.bench_function("(oo) decode samples.bin via file", |b| b.iter_with_large_drop(|| {
+        fh.seek(io::SeekFrom::Start(0)).ok();
+        IOBinarySource::new(&mut fh).packed().next_iovalue(true).unwrap()
+    }));
+}
+
+pub fn bench_decoder_buffered_file(c: &mut Criterion) {
+    let mut fh = io::BufReader::new(File::open("../../../tests/samples.bin").unwrap());
+    c.bench_function("(oo) decode samples.bin via buffered file", |b| b.iter_with_large_drop(|| {
+        fh.seek(io::SeekFrom::Start(0)).ok();
+        IOBinarySource::new(&mut fh).packed().next_iovalue(true).unwrap()
+    }));
+}
+
+pub fn bench_encoder(c: &mut Criterion) {
+    let mut fh = File::open("../../../tests/samples.bin").unwrap();
+    let v = IOBinarySource::new(&mut fh).packed().next_iovalue(true).unwrap();
+    c.bench_function("(oo) encode samples.bin", |b| b.iter_with_large_drop(
+        || PackedWriter::encode_iovalue(&v).unwrap()));
+}
+
+pub fn large_testdata_decoder_with_ann(c: &mut Criterion) {
+    c.bench_function("(oo) decode testdata.bin with annotations", |b| {
+        let mut fh = File::open("benches/testdata.bin").unwrap();
+        let mut bs = vec![];
+        fh.read_to_end(&mut bs).ok();
+        b.iter(|| {
+            let mut src = BytesBinarySource::new(&bs[..]);
+            let mut r = IOValues::new(src.packed()).read_annotations(true);
+            while let Some(Ok(_)) = r.next() {}
+        })
+    });
+}
+
+pub fn large_testdata_decoder_without_ann(c: &mut Criterion) {
+    c.bench_function("(oo) decode testdata.bin without annotations", |b| {
+        let mut fh = File::open("benches/testdata.bin").unwrap();
+        let mut bs = vec![];
+        fh.read_to_end(&mut bs).ok();
+        b.iter(|| {
+            let mut src = BytesBinarySource::new(&bs[..]);
+            let mut r = IOValues::new(src.packed()).read_annotations(false);
+            while let Some(Ok(_)) = r.next() {}
+        })
+    });
+}
+
+pub fn large_testdata_encoder(c: &mut Criterion) {
+    c.bench_function("(oo) encode testdata.bin", |b| {
+        let mut fh = io::BufReader::new(File::open("benches/testdata.bin").unwrap());
+        let mut src = IOBinarySource::new(&mut fh);
+        let vs = IOValues::new(src.packed()).read_annotations(true).collect::<Result<Vec<_>, _>>().unwrap();
+        b.iter_with_large_drop(|| {
+            let mut bs = vec![];
+            let mut w = PackedWriter::new(&mut bs);
+            let mut enc = IOValueDomainCodec;
+            for v in &vs {
+                v.write(&mut w, &mut enc).unwrap();
+            }
+            bs
+        })
+    });
+}
+
+criterion_group!(codec,
+                 bench_decoder_bytes, bench_decoder_file, bench_decoder_buffered_file,
+                 bench_encoder);
+criterion_group!{
+    name = large_testdata;
+    config = Criterion::default().sample_size(10);
+    targets = large_testdata_decoder_with_ann, large_testdata_decoder_without_ann, large_testdata_encoder
+}
+criterion_main!(codec, large_testdata);
diff --git a/implementations/rust/oo/benches/testdata.bin.gz b/implementations/rust/oo/benches/testdata.bin.gz
new file mode 100644
index 0000000..469262f
Binary files /dev/null and b/implementations/rust/oo/benches/testdata.bin.gz differ
diff --git a/implementations/rust/oo/src/lib.rs b/implementations/rust/oo/src/lib.rs
index 71a30ff..839caed 100644
--- a/implementations/rust/oo/src/lib.rs
+++ b/implementations/rust/oo/src/lib.rs
@@ -19,6 +19,7 @@ pub use packed::annotated_from_bytes;
 pub use packed::annotated_iovalue_from_bytes;
 pub use packed::from_bytes;
 pub use packed::iovalue_from_bytes;
+pub use reader::IOValues;
 pub use reader::Reader;
 pub use repr::Annotations;
 pub use repr::ArcValue;