diff --git a/benches/bench.rs b/benches/bench.rs
index fac6b08..bea7d22 100644
--- a/benches/bench.rs
+++ b/benches/bench.rs
@@ -1,7 +1,9 @@
 use bytes::Bytes;
 use criterion::{criterion_group, criterion_main, Criterion};
-use http::{HeaderName, HeaderValue};
+use http::{HeaderName, HeaderValue, StatusCode};
+use pingap::cache::{convert_headers, HttpResponse};
 use pingora::http::ResponseHeader;
+use std::time::{SystemTime, UNIX_EPOCH};
 
 fn insert_bytes_header(c: &mut Criterion) {
     c.bench_function("bytes header", |b| {
@@ -60,5 +62,40 @@ fn insert_header_name(c: &mut Criterion) {
     });
 }
 
-criterion_group!(benches, insert_bytes_header, insert_header_name,);
+fn get_response_header(c: &mut Criterion) {
+    c.bench_function("get response header for http response", |b| {
+        let resp = HttpResponse {
+            status: StatusCode::OK,
+            body: Bytes::from("Hello world!"),
+            max_age: Some(3600),
+            created_at: Some(
+                SystemTime::now()
+                    .duration_since(UNIX_EPOCH)
+                    .unwrap()
+                    .as_secs()
+                    - 10,
+            ),
+            private: Some(true),
+            headers: Some(
+                convert_headers(&[
+                    "Contont-Type: application/json".to_string(),
+                    "Content-Encoding: gzip".to_string(),
+                ])
+                .unwrap(),
+            ),
+        };
+
+        b.iter(|| {
+            let value = resp.clone();
+            value.get_response_header().unwrap();
+        });
+    });
+}
+
+criterion_group!(
+    benches,
+    insert_bytes_header,
+    insert_header_name,
+    get_response_header
+);
 criterion_main!(benches);
diff --git a/src/cache/http_response.rs b/src/cache/http_response.rs
index 36a5e9e..a4621a3 100644
--- a/src/cache/http_response.rs
+++ b/src/cache/http_response.rs
@@ -5,7 +5,7 @@ use http::StatusCode;
 use pingora::{http::ResponseHeader, proxy::Session};
 use std::time::{SystemTime, UNIX_EPOCH};
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, Clone)]
 pub struct HttpResponse {
     pub status: StatusCode,
     pub body: Bytes,
@@ -16,7 +16,7 @@ pub struct HttpResponse {
 }
 
 impl HttpResponse {
-    fn get_response_header(&self) -> pingora::Result<ResponseHeader> {
+    pub fn get_response_header(&self) -> pingora::Result<ResponseHeader> {
         let fix_size = 3;
         let size = self
             .headers
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..bb4f5a0
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,4 @@
+pub mod cache;
+pub mod config;
+pub mod proxy;
+pub mod utils;