[PHP] Benchmarking a script

[Anguz]

Hello,
I have a script I am optimizing and want to compare the before and after 
in speed. So I wrote a few lines to loop this script but I have a 
problem. In the script I'm optimizing there's some function definitions 
and when the script starts the second iteration it throws an error 
because the function already exists. How can I modify my benchmark code 
to make it work? This is what I have:

<?php
$bench_n = 1000;
for($bench_i=$bench_n; --$bench_i>=0; ){
        ob_start();
        $bench_time1 = array_sum(explode(' ', microtime()));
        // script start ************************************
                // script...
	// script end **************************************
	$bench_time0 += array_sum(explode(' ', microtime())) - $bench_time1;
	while(@ob_end_clean());
}
echo '<pre>Tot Time: ' , $bench_time0 , '<br />Loops:    ' , $bench_n , 
'<br />Avg Time: ' , ($bench_time0 / $bench_n) , '</pre>';
?>

Thank you very much in advance.
Cristian
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