[Dev-C++] Linux vs Windows speed

[jgana <jg...@vt...>]

First, thanks to everybody for your help
Second, forgive me, if I am asking something stupid=85You know, I am
learning.

I found out that a console program that is compiled with Dev-C++ (Mingw)
can run perfectly well in Linux and a lot faster. The program runs ~70%
slower in Windows.=20
Why there is a difference in speed if I am using the same machine?
(Pentium 400 MHz)=20

The program that I used is a very inefficient way to calculate the
Fibonacci Series. But, the point was to have a rough idea of the speed.
The Dev-C++ (Mingw) executable in windows took 1 minute 45 seconds in
finding the 22th element of the Fibonacci Series (17,711). The same
executable in Linux took 30 seconds to find the 22th element.
=20
#include <iostream.h>
#include <stdlib.h>

int Fib(int n);

int main()
{
  using namespace std;
  int n, answer, stop;
=20
 cout <<"Enter number to find: ";
 cin >>n;
 cout <<"\n\n";
 answer=3DFib(n);
 cout << answer <<" is the " << n <<"th Fibonacci number\n";
=20
      cin >>stop;
      return 0;
}

      int Fib(int n)
      {
      cout <<"Processing Fib(" << n << ")...";
           if (n<3)
           {
           cout <<"return 1!\n";
           return (1);
           }
           else
           {
           cout <<"call Fib(" << n-2 <<") and Fib(" << n-1 << ").\n";
           return( Fib(n-2)+Fib(n-1));
           }
      }
Best regards,

Jos=E9 Fco. Gana
Santiago, Chile.