diff --git a/POP3Client/POP3/src/main/ets/helper.ts b/POP3Client/POP3/src/main/ets/helper.ts
index 9312d8eb8a34a86c0cb9832bf4baa031801e6be7..5e910c08c486d58125677c4ae3a3ce39f2b680f6 100644
--- a/POP3Client/POP3/src/main/ets/helper.ts
+++ b/POP3Client/POP3/src/main/ets/helper.ts
@@ -6,6 +6,7 @@ import { Buffer } from '../polyfill/buffer';
  */
 export function stream2String(stream) {
   // eslint-disable-next-line promise/avoid-new -- Our own API
+  let startTime1 = new Date().getTime();
   return new Promise((resolve, reject) => {
     let buffer = Buffer.concat([]);
     let {length: len} = buffer;
@@ -15,6 +16,9 @@ export function stream2String(stream) {
     });
     stream.on('error', (err) => reject(err));
     stream.on('end', () => resolve(buffer.toString()));
+    let endTime1 = new Date().getTime();
+    let averageTime1 = ((endTime1 - startTime1) * 1000) / 1;
+    console.log("stream2String averageTime : " + averageTime1 + "us")
   });
 }
 
@@ -23,7 +27,12 @@ export function stream2String(stream) {
  * @returns {string[][]}
  */
 export function listify(str) {
-  return str.split(CRLF)
+  let startTime1 = new Date().getTime();
+  let result= str.split(CRLF)
     .filter(Boolean)
     .map((line) => line.split(' '));
+  let endTime1 = new Date().getTime();
+  let averageTime1 = ((endTime1 - startTime1) * 1000) / 1;
+  console.log("listify averageTime : " + averageTime1 + "us")
+  return result;
 }