diff --git a/src/main/java/io/github/ehlxr/sort/BubbleSort.java b/src/main/java/io/github/ehlxr/sort/BubbleSort.java
index bd5efd0..e291cda 100644
--- a/src/main/java/io/github/ehlxr/sort/BubbleSort.java
+++ b/src/main/java/io/github/ehlxr/sort/BubbleSort.java
@@ -24,7 +24,8 @@
 
 package io.github.ehlxr.sort;
 
-import java.util.Arrays;
+import java.text.SimpleDateFormat;
+import java.util.Date;
 
 /**
  * 冒泡排序
@@ -59,7 +60,7 @@ public class BubbleSort {
                     swap(arr, j, j + 1);
                 }
             }
-            System.out.println("Sorting: " + Arrays.toString(arr));
+            // System.out.println("Sorting: " + Arrays.toString(arr));
             if (!flag) {
                 break;
             }
@@ -77,6 +78,21 @@ public class BubbleSort {
     }
 
     public static void main(String[] args) {
-        sort(new int[]{4, 9, 1, 6, 8, 10});
+        // int[] arr = {4, 9, 1, 8, 6, 2};
+        int[] arr = new int[80000];
+        for (int i = 0; i < 80000; i++) {
+            arr[i] = (int) (Math.random() * 8000000); //生成一个[0, 8000000) 数
+        }
+
+        Date data1 = new Date();
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        String date1Str = simpleDateFormat.format(data1);
+        System.out.println("排序前的时间是=" + date1Str);
+
+        sort(arr);
+
+        Date data2 = new Date();
+        String date2Str = simpleDateFormat.format(data2);
+        System.out.println("排序后的时间是=" + date2Str);
     }
 }
diff --git a/src/main/java/io/github/ehlxr/sort/InsertSort.java b/src/main/java/io/github/ehlxr/sort/InsertSort.java
index f1cbcce..4d2d602 100644
--- a/src/main/java/io/github/ehlxr/sort/InsertSort.java
+++ b/src/main/java/io/github/ehlxr/sort/InsertSort.java
@@ -24,7 +24,9 @@
 
 package io.github.ehlxr.sort;
 
+import java.text.SimpleDateFormat;
 import java.util.Arrays;
+import java.util.Date;
 
 /**
  * 插入排序
@@ -55,7 +57,7 @@ public class InsertSort {
                     break;
                 }
             }
-            System.out.println(Arrays.toString(arr));
+            // System.out.println(Arrays.toString(arr));
         }
     }
 
@@ -88,6 +90,21 @@ public class InsertSort {
     }
 
     public static void main(String[] args) {
-        sort2(new int[]{4, 9, 1, 8, 6, 2});
+        // int[] arr = {4, 9, 1, 8, 6, 2};
+        int[] arr = new int[80000];
+        for (int i = 0; i < 80000; i++) {
+            arr[i] = (int) (Math.random() * 8000000); //生成一个[0, 8000000) 数
+        }
+
+        Date data1 = new Date();
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        String date1Str = simpleDateFormat.format(data1);
+        System.out.println("排序前的时间是=" + date1Str);
+
+        sort(arr);
+
+        Date data2 = new Date();
+        String date2Str = simpleDateFormat.format(data2);
+        System.out.println("排序后的时间是=" + date2Str);
     }
 }
diff --git a/src/main/java/io/github/ehlxr/sort/ShellSort.java b/src/main/java/io/github/ehlxr/sort/ShellSort.java
index f678e16..245ab5d 100644
--- a/src/main/java/io/github/ehlxr/sort/ShellSort.java
+++ b/src/main/java/io/github/ehlxr/sort/ShellSort.java
@@ -24,7 +24,8 @@
 
 package io.github.ehlxr.sort;
 
-import java.util.Arrays;
+import java.text.SimpleDateFormat;
+import java.util.Date;
 
 /**
  * 希尔排序
@@ -61,7 +62,7 @@ public class ShellSort {
             }
         }
 
-        System.out.println(Arrays.toString(arr));
+        // System.out.println(Arrays.toString(arr));
 
         // 每次将 gap 折半减小，循环上述操作
         sort(arr, gap / 2);
@@ -74,9 +75,23 @@ public class ShellSort {
     }
 
     public static void main(String[] args) {
-        int[] arr = {4, 9, 1, 8, 6, 2};
+        // int[] arr = {4, 9, 1, 8, 6, 2};
+        int[] arr = new int[80000];
+        for (int i = 0; i < 80000; i++) {
+            arr[i] = (int) (Math.random() * 8000000); //生成一个[0, 8000000) 数
+        }
+
+        Date data1 = new Date();
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        String date1Str = simpleDateFormat.format(data1);
+        System.out.println("排序前的时间是=" + date1Str);
+
         sort(arr, arr.length / 2);
         // sort(arr);
+
+        Date data2 = new Date();
+        String date2Str = simpleDateFormat.format(data2);
+        System.out.println("排序后的时间是=" + date2Str);
     }
 
     // public static void sort(int[] arr) {