diff --git a/README-EN.md b/README-EN.md
index 242a5f1..8c24658 100644
--- a/README-EN.md
+++ b/README-EN.md
@@ -5,6 +5,7 @@
 
 <div align="center">
     <img src='https://gitee.com/huoyo/ko-time/badge/star.svg'>
+    <img src='https://img.shields.io/github/stars/huoyo/ko-time.svg?&label=Stars&logo=github'>
     <img src='https://shields.io/badge/version-2.4.0-green.svg'>
     <img src='https://shields.io/badge/author-Chang Zhang-dbab09.svg'>
     <img src='https://shields.io/badge/dependencies-Spring|aspectjweaver|tomcat|UIKit|Metricflow-r.svg'>
diff --git a/README.md b/README.md
index a74c2a3..5e45d58 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@
 
 <div align="center">
     <img src='https://gitee.com/huoyo/ko-time/badge/star.svg'>
+    <img src='https://img.shields.io/github/stars/huoyo/ko-time.svg?&label=Stars&logo=github'>
     <img src='https://shields.io/badge/version-2.4.0-green.svg'>
     <img src='https://shields.io/badge/author-Chang Zhang-dbab09.svg'>
     <img src='https://shields.io/badge/dependencies-Spring|aspectjweaver|tomcat|UIKit|Metricflow-r.svg'>
diff --git a/src/main/java/cn/langpy/kotime/service/GraphService.java b/src/main/java/cn/langpy/kotime/service/GraphService.java
index 4aed3dd..3e8746c 100644
--- a/src/main/java/cn/langpy/kotime/service/GraphService.java
+++ b/src/main/java/cn/langpy/kotime/service/GraphService.java
@@ -9,6 +9,9 @@ import java.util.Map;
 
 /**
  * zhangchang
+ * Note:数据的存储目前是没有考虑线程安全的，实际意义上来说，我们并不需要完整记录每一次调用的结果，因为同一个方法来说，高频调用情况下，每次的耗时差距并不大，
+ * 除此之外项目还增加了ko-time.discard-rate参数允许你去丢弃一部分数据，从而提高IO
+ * We did not care about thread-safety of all data savers,because it is unnecessary for your actual application
  */
 public interface GraphService {