#include <iostream>
#include <chrono>
#define NUM_ITERATIONS 10000000000
int main()
{
// Block 1: one operation in loop body
{
int64_t x = 0, y = 0;
auto start = std::chrono::high_resolution_clock::now();
for (long i = 0; i < NUM_ITERATIONS; i++) {x+=31;}
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end-start;
std::cout << diff.count() << " seconds. x,y = " << x << "," << y << std::endl;
}
// Block 2: two operations in loop body
{
int64_t x = 0, y = 0;
auto start = std::chrono::high_resolution_clock::now();
for (long i = 0; i < NUM_ITERATIONS; i++) {x+=17; y-=37;}
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end-start;
std::cout << diff.count() << " seconds. x,y = " << x << "," << y << std::endl;
}
return 0;
}
