带/不带“cout”的C ++性能

C++ Performance with/without “cout”

大家好。

我的问题很简单，但我没有答案。下面你可以看到我的C++代码——它有一点大但很简单——当我用EDCOX1，0代码运行代码时，它运行不到1秒，当我不评论它行大约2分钟(我谈到释放，因为在调试中运行更多的时间)。请注意，该行只产生很少的输出行(所以问题不是程序必须调用"cout"太多次)谢谢大家。这是我的代码：

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#include <cstdlib>
#include <iostream>

using namespace std;

struct cell {
int x;
int y;
};

int main(int argc, char** argv) {
cell vector[8];
unsigned long int yy=0;

for (int aaa = 0; aaa < 8; aaa++) {
vector[0].x = aaa;
for (int aab = 0; aab < 8; aab++) {
vector[0].y = aab;
for (int aac = 0; aac < 8; aac++) {
vector[1].x = aac;
for (int aad = 0; aad < 8; aad++) {
vector[1].y = aad;
for (int aae = 0; aae < 8; aae++) {
vector[2].x = aae;
for (int aaf = 0; aaf < 8; aaf++) {
vector[2].y = aaf;
for (int aag = 0; aag < 8; aag++) {
vector[3].x = aag;
for (int aah = 0; aah < 8; aah++) {
vector[3].y = aah;
for (int aai = 0; aai < 8; aai++) {
vector[4].x = aai;
for (int aaj = 0; aaj < 8; aaj++) {
vector[4].y = aaj;
for (int aak = 0; aak < 8; aak++) {
vector[5].x = aak;
for (int aal = 0; aal < 8; aal++) {
vector[5].y = aal;
yy++;
if(yy%10000000000==0){
vector[5].y = aal-1;
//std::cout<<yy<<endl;
}

}
}
}
}
}
}
}
}
}
}
}
}
std::cout<<yy<<endl;
std::cout<<vector[5].y<<endl;
return 0;
}