My C++ program takes about 300 s to run.
Inside my program I need to cwis divide my vectors. VS analyzer tells this takes about 15% of running time. here is the code:

```
template <class T> myVector<T> cWisDivide(myVector<T> &vec1, 

myVector<T> &vec2)
{
    try
    {
        if (vec1._rows == vec2._rows)
        {
            myVector<T> result(vec1._rows);
            //#pragma omp parallel for 
            for (int r = 1; r <= vec1._rows; r++)
            {
                if (vec2(r) != 0)
                {
                    result(r) = vec1(r) / vec2(r);
                }
                else
                {
                    throw std::runtime_error("");
                }
            }
            return result;
        }
    }
    catch (const exception &e)
    {
        ....
    }
}

```

this function is called many time.
If I use #pragma ... before the loop, the cpu usage sticks 100% for about 350 s. which is more than the time taken to run program sequentially.

I would appreciate if any one could help me on the issue.