template <typename T>
class CRTPBase
{
  public:
    int tick(int n) 
    {
      return impl().tick(n);
    }
  private:
    T& impl() { return *static_cast<T*>(this); }
};

class CRTPDerived : public CRTPBase<CRTPDerived> 
{
  public :
    int m_counter;
  public:
    CRTPDerived() : m_counter(0) {}
    int tick(int n) { m_counter += n; return m_counter; }
};

int test_crtp (int test_run)
{
  CRTPBase<CRTPDerived>* pObj = new CRTPDerived ;
  for( int i = 0 ; i < test_run; i++ )
  {
    for( int j = 0 ; j < test_run; j++ )
    {
      pObj->tick(j);
    }
  }
  return static_cast<CRTPDerived*>(pObj)->m_counter;
}

int main (int argc, char** argv)
{
  return test_crtp(2000);
}