This benchmark script checks the speed of each method in any classes it is given. It is a very effective way to compare two different algorithms.

By : jinxidoru

<?php
/**
* This script runs every method in a set of classes a specified
* number of times. The total time taken as well as the average
* time per iteration is printed after each test.
*
* The script is run from the command line with as many arguments
* as desired. An attempt is made to require each file given on
* the command-line. The last element of the arg list, specifies
* the number of iterations to execute for each method. For
* example, the following call loads array_funcs.php and iterates
* 100 times for each method:
* $ php -Cq benchmark.php array_funcs.php 100
*
* After loading all of the specified files, any non system class
* is instantiated and each of its methods are executed a number
* of times equal to the iteration value. When complete, a line
* containing the method, total execution time (ms), and average
* execution time per call (ms) is displayed.
*
* Author: Michael Bailey (jinxidoru@byu.net)
* Date: June 2004
* License: GPL
*/

// get an array of the system classes
$system_classes = get_declared_classes();

// load the class and file
foreach ($_SERVER['argv'] AS $i => $file)
@include_once $file;

// get the iteration count
$iter = $_SERVER['argv'][count($_SERVER['argv'])-1];
if ($iter < 1) $iter = 1;

// benchmark every class
foreach (array_diff(get_declared_classes(),$system_classes) AS $class) {
print "\n-= $class =-\n";

// create an instance
$inst = new $class();

// test each method
foreach (get_class_methods($class) AS $method) {
// get start time
$start = microtime();

// run method
for ($i=0; $i<$iter; $i++) $inst->$method();

// parse time
$stop = microtime();
list($start_usec, $start_sec) = explode(' ',$start);
$start = ((float)$start_usec + (float)$start_sec);
list($stop_usec, $stop_sec) = explode(' ',$stop);
$stop = ((float)$stop_usec + (float)$stop_sec);
$elapsed = ($stop-$start)*1000;

// display elapsed time
printf(" @ (%d) %15s: %4.3fms ~ %4.3fms\n", $iter, $method, $elapsed, $elapsed/$iter);
}
}

?>

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