diff --git a/src/cluster.rs b/src/cluster.rs
index ca91f32..fc5117d 100644
--- a/src/cluster.rs
+++ b/src/cluster.rs
@@ -106,7 +106,7 @@ mod tests {
 
     #[derive(Deserialize)]
     struct TestConfig {
-        pub cluster_port: u32,
+        pub cluster_port: Option<u32>,
         pub cluster_id: String,
         pub cluster_secret: String,
     }
@@ -118,7 +118,7 @@ mod tests {
 
         Config::new(
             None,
-            "".to_string(),
+            None,
             test_conf.cluster_port,
             test_conf.cluster_id,
             test_conf.cluster_secret,
diff --git a/src/config.rs b/src/config.rs
index 79a75ab..82bfaff 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -2,6 +2,7 @@ use {
     crate::fatal,
     log::{error, info, warn},
     std::{env, fs},
+    serde::{Serialize, Deserialize}
 };
 
 const CONFIG_PATH: &str = "config.toml";
@@ -97,12 +98,6 @@ impl Config {
         });
     }
 
-    pub fn load() -> Result<Self> {
-        toml::from_str(&self.load_raw()?).map_err(|err| {
-            fatal!("Failed to parse config file");
-        })
-    }
-
     pub fn join_center_url(&self, path: &str) -> String {
         format!("{}{}", self.center_url, path)
     }
diff --git a/src/serve.rs b/src/serve.rs
index cd20f5f..2f7a92b 100644
--- a/src/serve.rs
+++ b/src/serve.rs
@@ -45,8 +45,8 @@ impl IntoResponse for MeasureRes {
 ///
 /// export default MeasureRoute
 /// ```
+/// 
 pub async fn measure(header: HeaderMap, Path(size): Path<u32>) -> MeasureRes {
-    let mut data: Vec<u8> = Vec::new();
     match header.get("x-openbmclapi-secret") {
         Some(secret) => {
             if secret != "secret" {
@@ -55,10 +55,9 @@ pub async fn measure(header: HeaderMap, Path(size): Path<u32>) -> MeasureRes {
             if size > 200 {
                 return MeasureRes::BadResquest;
             }
-            let buffer: Vec<u8> = vec![0x00, 0x66, 0xcc, 0xff];
-            for _ in 0..size {
-                data.extend(&buffer);
-            }
+            // size -> size * mb
+            let mut data: Vec<u8> = Vec::with_capacity((size * 1024 * 1024) as usize);
+            data.fill(114_u8);
             return MeasureRes::Data(data);
         }
         None => MeasureRes::Forbidden