OnkelTem

<?php

define('COUNT', 1000);

$tests = array('<b>PHP native</b>', '<b>PHP eval</b>', '<b>PEAR RPN true-rpn</b>', '<b>PEAR RPN generic</b>');
$results = array();

echo "<p>Running ".COUNT." times</p>";

echo "<p>Using $tests[0]: ";
$start = microtime(true);
for($i=0; $i<COUNT; $i++) {
  $ret = 1230 + 1800 + $i;
}
$results[0] = microtime(true) - $start;
echo $results[0]; echo 's</p>';

echo "<p>Using $tests[1]: ";
$start = microtime(true);
for($i=0; $i<COUNT; $i++) {
  if (!($ret = eval('return 1230 + 1800 + '.$i.';'))) {
    die('error in eval expression');
  } else {
    //print $ret . '<br/>';
  }
}
$results[1] = microtime(true) - $start;
echo $results[1]; echo 's</p>';

echo "<p>Using $tests[2]: ";
$start = microtime(true);
include_once 'Math/RPN.php';
$rpn = new Math_Rpn();
for($i=0; $i<COUNT; $i++) {
  $expression = '1230 1800 + '.$i.' +';
  if (($ret = $rpn->calculate($expression, 'deg', true)) == 'Syntax error') {
    die('error in RPN expression');
  } else {
    //print $ret . '<br/>';
  }
}
$results[2] = microtime(true) - $start;
echo $results[2]; echo 's</p>';

echo "<p>Using $tests[2]: ";
$start = microtime(true);
include_once 'Math/RPN.php';
$start = microtime(true);
for($i=0; $i<COUNT; $i++) {
  $expression = '1230 + 1800 + '.$i;
  $rpn = new Math_Rpn();
  if (($ret = $rpn->calculate($expression, 'deg', false)) == 'Syntax error') {
    die('error in RPN expression');
  } else {
    //print $ret . '<br/>';
  }
}
$results[3] = microtime(true) - $start;
echo $results[3]; echo 's</p>';

echo "<p>RESULTS</p>";

echo "<p>$tests[1] is slower then $tests[0] in ".round($results[1]/$results[0])." times</p>";
echo "<p>$tests[2] is slower then $tests[0] in ".round($results[2]/$results[0])." times</p>";
echo "<p>$tests[3] is slower then $tests[0] in ".round($results[3]/$results[0])." times</p>";
echo "<p>$tests[2] is slower then $tests[1] in ".round($results[2]/$results[1])." times</p>";
echo "<p>$tests[3] is slower then $tests[1] in ".round($results[3]/$results[1])." times</p>";
echo "<p>$tests[3] is slower then $tests[2] in ".round($results[3]/$results[2])." times</p>";