<?php
// preg-bench.php
// Benchmarks preg_replace using consecutive calls vs. single array
// 18.12.2005 by b1n0ry on ##php @ irc.freenode.net

$sampletext = 'text'; // text to test with should contain the word 'text'
$iterations = 100000; // number of times to execute each method
$teststoaverage = $iterations;  // times to repeat the test for an average

print "Testing, be patient...";

//- Consecutive Test
$totaltesttime = 0;
for($j=0;$j < $teststoaverage;$j++) {
        $text = $sampletext;
        $starttime = microtime();
        for($i=0;$i < $iterations;$i++) {
                $text = preg_replace('/text/s','text',$text);
        }
        $totaltesttime = $totaltesttime + abs(microtime() - $starttime);
}
$consecutiveaverage = $totaltesttime / $teststoaverage;

//- Array Test
$totaltesttime = 0;
for($j=0;$j < $teststoaverage;$j++) {
        $text = $sampletext;
        $regex = array();
        $replace = array();
        for($i=0;$i < $iterations;$i++) {
                $regex[$i] = '/text/s';
                $replace[$i] = 'text';
        }
        $starttime = microtime();
        $text = preg_replace($regex,$replace,$text);
        $totaltesttime = $totaltesttime + abs(microtime() - $starttime);
        unset($regex,$replace);
}
$arrayaverage = $totaltesttime / $teststoaverage;

//- Output Results
print "Done\n";
print "Average time to process $iterations consecutive preg_replace() calls (s): $consecutiveaverage\n";
print "Average time to process preg_replace() with arrays of size $iterations (s): $arrayaverage\n";
if($consecutiveaverage > $arrayaverage) {
        print "Arrays win!\n";
} else {
        print "Consecutive calls win!\n";
}
?>