diff --git a/misc/likely.cpp b/misc/likely.cpp
index 202e11b..cee5c17 100644
--- a/misc/likely.cpp
+++ b/misc/likely.cpp
@@ -1,85 +1,93 @@
 #include <iostream>
-#include <thread>
-#include <chrono>
 #include <sys/time.h>
-#include <limits.h>
 
 #define likely(x) __builtin_expect(!!(x), 1)
 #define unlikely(x) __builtin_expect(!!(x), 0)
 
 using namespace std;
-#define SIZE 500000000
+const int SIZE = 128 * 1024 * 1024;
+const int RANGE = RAND_MAX / 2;
 
 int arr[SIZE];
 
-void func(int *pval)
+void func1(int *pval)
 {
-    double ret = 0;
+    int big = 0, small = 0;
     timeval start, end;
     gettimeofday(&start, nullptr);
-    while (*pval)
+    for (int idx = 0; idx < SIZE; idx++)
     {
-        if (((*pval) == 256))
-            ret = ret + 1234;
+        if (((pval[idx]) > RANGE / 2))
+            big++;
         else
-            ret = ret + 5678;
-        pval++;
+            small++;
     }
     gettimeofday(&end, nullptr);
     double usec = (end.tv_sec - start.tv_sec) + (double)(end.tv_usec - start.tv_usec) / 1000000;
-    cout << __func__ << " duration: " << usec << ", ret: " << ret << endl;
+    cout << __func__ << " duration: " << usec << ", big: " << big << ", small:" << small << endl;
+}
+
+void func2(int *pval)
+{
+    int big = 0, small = 0;
+    timeval start, end;
+    gettimeofday(&start, nullptr);
+    for (int idx = 0; idx < SIZE; idx++)
+    {
+        if (((pval[idx]) <= RANGE / 2))
+            small++;
+        else
+            big++;
+    }
+    gettimeofday(&end, nullptr);
+    double usec = (end.tv_sec - start.tv_sec) + (double)(end.tv_usec - start.tv_usec) / 1000000;
+    cout << __func__ << " duration: " << usec << ", big: " << big << ", small:" << small << endl;
 }
 
 void func_likely(int *pval)
 {
-    double ret = 0;
+    int big = 0, small = 0;
     timeval start, end;
     gettimeofday(&start, nullptr);
-    while (*pval)
+    for (int idx = 0; idx < SIZE; idx++)
     {
-        if (likely((*pval) == 256))
-            ret = ret + 1234;
+        if (likely((pval[idx]) > RANGE / 2))
+            big++;
         else
-            ret = ret + 5678;
-        pval++;
+            small++;
     }
     gettimeofday(&end, nullptr);
     double usec = (end.tv_sec - start.tv_sec) + (double)(end.tv_usec - start.tv_usec) / 1000000;
-    cout << __func__ << " duration: " << usec << ", ret: " << ret << endl;
+    cout << __func__ << " duration: " << usec << ", big: " << big << ", small:" << small << endl;
 }
 
 void func_unlikely(int *pval)
 {
-    double ret = 0;
+    int big = 0, small = 0;
     timeval start, end;
     gettimeofday(&start, nullptr);
-    while (*pval)
+    for (int idx = 0; idx < SIZE; idx++)
     {
-        if (unlikely((*pval) == 256))
-            ret = ret + 1234;
+        if (unlikely((pval[idx]) > RANGE / 2))
+            big++;
         else
-            ret = ret + 5678;
-        pval++;
+            small++;
     }
+
     gettimeofday(&end, nullptr);
     double usec = (end.tv_sec - start.tv_sec) + (double)(end.tv_usec - start.tv_usec) / 1000000;
-    cout << __func__ << " duration: " << usec << ", ret: " << ret << endl;
+    cout << __func__ << " duration: " << usec << ", big: " << big << ", small:" << small << endl;
 }
 
 int main()
 {
+    srand(time(nullptr));
     for (int i = 0; i < SIZE; i++)
     {
-        if (i % 1000 == 0)
-            *(arr + i) = 256;
-        else
-            *(arr + i) = 128;
+        arr[i] = (rand() % (RANGE + 1)) + 0.499 * RANGE;
     }
-    arr[SIZE - 1] = 0;
-    std::thread t1(func, arr);
-    std::thread t2(func_likely, arr);
-    std::thread t3(func_unlikely, arr);
-    t1.join();
-    t2.join();
-    t3.join();
+    func1(arr);
+    func2(arr);
+    func_likely(arr);
+    func_unlikely(arr);
 }
\ No newline at end of file