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<center><b><big><big>time_test: Example and test</big></big></b></center>
<code><font color="blue"><pre style='display:inline'> 
# include &lt;cppad/time_test.hpp&gt;
# include &lt;vector&gt;

namespace { // empty namespace

	// size for the test
	size_t size_;

	void test(size_t repeat)
	{	// setup
		double *a = new double[size_];
		double *b = new double[size_];
		double *c = new double[size_];
		size_t i  = size_;;
		while(i)
		{	--i;
			a[i] = i;
			b[i] = 2 * i;
		}
		// operations we are timing
		while(repeat--)
		{	i = size_;
			while(i)
			{	--i;
				c[i] = a[i] * b[i];
			}
		}
		// teardown
		delete [] a;
		delete [] b;
		delete [] c;
		return;
	}
}
bool time_test(void)
{	bool ok = true;

	// minimum amount of time to run test
	double time_min = 0.5; 

	// size of first test case
	size_ = 20;

	// run the first test case
	double time_first = CppAD::time_test(test, time_min);

	// size of second test case is twice as large
	size_ = 2 * size_;

	// run the second test case
	double time_second = CppAD::time_test(test, time_min);

	// for this case, time should be linear w.r.t size
	double rel_diff = 1. - 2. * time_first / time_second;
	ok             &amp;= (std::fabs(rel_diff) &lt;= .1);
	if( ! ok )
		std::cout &lt;&lt; std::endl &lt;&lt; &quot;rel_diff = &quot; &lt;&lt; rel_diff  &lt;&lt; std::endl;
 
	return ok;
}
</pre>

</font></code>


<hr/>Input File: speed/example/time_test.cpp

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