add benchmark

Author: Rain Liu

Cargo.toml

@@ -14,3 +14,10 @@ url = "2.2.2"
 rand = "0.8.4"
 thiserror = "1.0"
 substring = "1.4.5"
+
+[dev-dependencies]
+criterion = "0.3.5"
+
+[[bench]]
+name = "bench"
+harness = false

benches/bench.rs

@@ -0,0 +1,51 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use sdp::SessionDescription;
+use std::io::Cursor;
+
+const CANONICAL_UNMARSHAL_SDP: &str = "v=0\r\n\
+o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5\r\n\
+s=SDP Seminar\r\n\
+i=A Seminar on the session description protocol\r\n\
+u=http://www.example.com/seminars/sdp.pdf\r\n\
+[email protected] (Jane Doe)\r\n\
+p=+1 617 555-6011\r\n\
+c=IN IP4 224.2.17.12/127\r\n\
+b=X-YZ:128\r\n\
+b=AS:12345\r\n\
+t=2873397496 2873404696\r\n\
+t=3034423619 3042462419\r\n\
+r=604800 3600 0 90000\r\n\
+z=2882844526 -3600 2898848070 0\r\n\
+k=prompt\r\n\
+a=candidate:0 1 UDP 2113667327 203.0.113.1 54400 typ host\r\n\
+a=recvonly\r\n\
+m=audio 49170 RTP/AVP 0\r\n\
+i=Vivamus a posuere nisl\r\n\
+c=IN IP4 203.0.113.1\r\n\
+b=X-YZ:128\r\n\
+k=prompt\r\n\
+a=sendrecv\r\n\
+m=video 51372 RTP/AVP 99\r\n\
+a=rtpmap:99 h263-1998/90000\r\n";
+
+fn benchmark_sdp(c: &mut Criterion) {
+    let mut reader = Cursor::new(CANONICAL_UNMARSHAL_SDP.as_bytes());
+    let sdp = SessionDescription::unmarshal(&mut reader).unwrap();
+
+    ///////////////////////////////////////////////////////////////////////////////////////////////
+    c.bench_function("Benchmark Marshal", |b| {
+        b.iter(|| {
+            let _ = sdp.marshal();
+        })
+    });
+
+    c.bench_function("Benchmark Unmarshal ", |b| {
+        b.iter(|| {
+            let mut reader = Cursor::new(CANONICAL_UNMARSHAL_SDP.as_bytes());
+            let _ = SessionDescription::unmarshal(&mut reader).unwrap();
+        })
+    });
+}
+
+criterion_group!(benches, benchmark_sdp);
+criterion_main!(benches);