Add benchmarking using criterion

Cargo.toml

@@ -18,3 +18,8 @@ env_logger = "0.7"
 primitive-types = "0.6"
 ssz = "0.1.2"
 ssz-derive = "0.1.2"
+criterion = "0.2"
+
+[[bench]]
+name = "scout_bench"
+harness = false

scripts/bazaar/Cargo.toml

@@ -20,3 +20,4 @@ crate-type = ["cdylib"]
 [profile.release]
 lto = true
 debug = false
+opt-level = 3

src/main.rs

@@ -928,16 +928,28 @@ fn process_yaml_test(filename: &str) -> Result<(), ScoutError> {
     Ok(())
 }
 
-fn main() {
-    env_logger::init();
+#[macro_use]
+extern crate criterion;
 
-    let args: Vec<String> = env::args().collect();
-    let ret = process_yaml_test(if args.len() != 2 {
-        "test.yaml"
-    } else {
-        &args[1]
+use criterion::black_box;
+use criterion::Criterion;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    env_logger::init();
+    c.bench_function("test", |b| {
+        b.iter(|| {
+            let args: Vec<String> = env::args().collect();
+            let ret = process_yaml_test(if args.len() != 2 {
+                "test.yaml"
+            } else {
+                &args[1]
+            });
+            if ret.is_err() {
+                println!("Unexpected test failure: {:?}", ret.err().unwrap())
+            }
+        })
     });
-    if ret.is_err() {
-        println!("Unexpected test failure: {:?}", ret.err().unwrap())
-    }
 }
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);