add bench_header utility

Cargo.toml

@@ -34,3 +34,6 @@ bytes = "0.4"
 mime = "0.3"
 sha-1 = "0.8"
 time = "0.1"
+
+[features]
+nightly = []

src/common/content_type.rs

@@ -147,5 +147,8 @@ mod tests {
             Some(ContentType::json()),
         );
     }
+
+    bench_header!(bench_plain, ContentType, "text/plain");
+    bench_header!(bench_json, ContentType, "application/json");
+    bench_header!(bench_formdata, ContentType, "multipart/form-data; boundary=---------------abcd");
 }
-//bench_header!(bench, ContentType, { vec![b"application/json".to_vec()] });

src/common/mod.rs

@@ -86,6 +86,45 @@ fn test_encode<T: ::Header>(header: T) -> ::http::HeaderMap {
     map
 }
 
+#[cfg(test)]
+macro_rules! bench_header {
+    ($mod:ident, $ty:ident, $value:expr) => {
+        #[cfg(feature = "nightly")]
+        mod $mod {
+            use super::$ty;
+            use ::HeaderMapExt;
+
+            #[bench]
+            fn bench_decode(b: &mut ::test::Bencher) {
+                let mut map = ::http::HeaderMap::new();
+                map.append(
+                    <$ty as ::Header>::name(),
+                    $value.parse().expect("HeaderValue::from_str($value)")
+                );
+                b.bytes = $value.len() as u64;
+                b.iter(|| {
+                    map.typed_get::<$ty>().unwrap();
+                });
+            }
+
+            #[bench]
+            fn bench_encode(b: &mut ::test::Bencher) {
+                let mut map = ::http::HeaderMap::new();
+                map.append(
+                    <$ty as ::Header>::name(),
+                    $value.parse().expect("HeaderValue::from_str($value)")
+                );
+                let typed = map.typed_get::<$ty>().unwrap();
+                b.bytes = $value.len() as u64;
+                b.iter(|| {
+                    map.typed_insert(typed.clone());
+                    map.clear();
+                });
+            }
+        }
+    }
+}
+
 //mod accept;
 //mod accept_charset;
 //mod accept_encoding;

src/lib.rs

@@ -69,6 +69,7 @@
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
 #![cfg_attr(test, deny(warnings))]
+#![cfg_attr(all(test, feature = "nightly"), feature(test))]
 
 extern crate base64;
 #[macro_use]
@@ -80,6 +81,8 @@ extern crate headers_derive;
 extern crate http;
 extern crate mime;
 extern crate sha1;
+#[cfg(all(test, feature = "nightly"))]
+extern crate test;
 extern crate time;
 
 pub use headers_core::{