为什么平均打印数组元素比打印单个对象慢C++?

我做了一个测试，通过将数组元素和单个对象的值打印到 CLI 中来查看它们之间的区别：

#include <iostream>
#include <chrono>
#include <iomanip>
int main()
{
int a[10] = {1,2,3,4,5,6,7,8,9,10};
int v1 = 1;
int v2 = 2;
int v3 = 3;
int v4 = 4;
int v5 = 5;
int v6 = 6;
int v7 = 7;
int v8 = 8;
int v9 = 9;
int v10 = 10;
std::cout << "Array output:" << std::endl << std::endl;
auto t_start1 = std::chrono::high_resolution_clock::now();
std::cout << "1. value: " << a[0] << std::endl;
std::cout << "2. value: " << a[1] << std::endl;
std::cout << "3. value: " << a[2] << std::endl;
std::cout << "4. value: " << a[3] << std::endl;
std::cout << "5. value: " << a[4] << std::endl;
std::cout << "6. value: " << a[5] << std::endl;
std::cout << "7. value: " << a[6] << std::endl;
std::cout << "8. value: " << a[7] << std::endl;
std::cout << "9. value: " << a[8] << std::endl;
std::cout << "10. value: " << a[9] << std::endl;
auto t_end1 = std::chrono::high_resolution_clock::now();
std::cout << std::endl;
std::cout << "Variable output:" << std::endl << std::endl;
auto t_start2 = std::chrono::high_resolution_clock::now();
std::cout << "1. value: " << v1 << std::endl;
std::cout << "2. value: " << v2 << std::endl;
std::cout << "3. value: " << v3 << std::endl;
std::cout << "4. value: " << v4 << std::endl;
std::cout << "5. value: " << v5 << std::endl;
std::cout << "6. value: " << v6 << std::endl;
std::cout << "7. value: " << v7 << std::endl;
std::cout << "8. value: " << v8 << std::endl;
std::cout << "9. value: " << v9 << std::endl;
std::cout << "10. value: " << v10 << std::endl;

auto t_end2 = std::chrono::high_resolution_clock::now();
std::cout<< std::endl << "Time passed with array: "
<< std::chrono::duration<double, std::milli>(t_end1-t_start1).count()
<< " msn" << std::endl;
std::cout<< std::endl << "Time passed with variables: "
<< std::chrono::duration<double, std::milli>(t_end2-t_start2).count()
<< " msn" << std::endl;
return 0;
}

在第一个实现(Windows 10，cmd.exe 下的 MingW/g++(上，数组元素内的值打印平均比使用单个标量对象慢 3毫秒：

Windows 表，g++/MingW：

Array Elements:            Single Objects:   
1. Run          13.9609 ms                 9.529 ms
2. Run          11.9031 ms                 8.0936 ms
3. Run          13.3706 ms                 9.5264 ms
4. Run          12.5302 ms                 8.4723 ms
5. Run          14.4679 ms                 9.9688 ms
6. Run          12.3989 ms                 8.4326 ms
7. Run          12.8719 ms                 10.1851 ms
8. Run          10.9138 ms                 7.4481 ms
9. Run          12.8971 ms                 9.4094 ms
10. Run         11.9045 ms                 7.9391 ms
11. Run          9.9192 ms                 8.4047 ms
12. Run         13.4106 ms                 10.0296 ms

在第二个实现(Linux Ubuntu 下的 g++(上，数组元素内的值打印平均比使用单个标量对象慢 3微秒：

Linux Ubuntu， g++ 的表：

Array Elements:            Single Objects:   
1. Run          0.013 ms                   0.008 ms
2. Run          0.012 ms                   0.007 ms
3. Run          0.013 ms                   0.008 ms
4. Run          0.014 ms                   0.009 ms
5. Run          0.012 ms                   0.008 ms
6. Run          0.013 ms                   0.008 ms
7. Run          0.013 ms                   0.009 ms
8. Run          0.014 ms                   0.009 ms
9. Run          0.012 ms                   0.008 ms
10. Run         0.013 ms                   0.009 ms
11. Run         0.012 ms                   0.009 ms
12. Run         0.012 ms                   0.008 ms 

我的问题：

• 为什么在 *C++ 中打印数组元素中的值平均比打印单个对象中的值慢？

*信息：我不知道数组元素的打印是否总体上平均较慢，与特定语言无关。