codepaste

test

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<html xmlns="http://www.w3.org/1999/xhtml"> 
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<title>in_array vs. array_key exists - speed test</title> 
<link href="tests.css" rel="stylesheet" type="text/css" /> 
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<body>

<?php

$file = 'in_array-vs-array_key_exists.php';
$array_key_time = 0; //initial offset is 0 for each time
$in_array_time = 0;
$slanty_time = 0;

//these are the test data
$array_key = array(
	4=>1,
	3=>1,
	2=>1,
	9=>1,
	5=>1,
	21=>1,
	8=>1,
	19=>1,
	40=>1,
	14=>1,
	12=>1,
);

$array = array(4,3,2,9,5,21,8,19,40,14,12);

//config defaults and setup
$cycles = 20;
$operations = 10000;

if (array_key_exists('operations', $_REQUEST) and is_numeric($_REQUEST['operations']))
	$operations = $_REQUEST['operations'];
if (array_key_exists('cycles', $_REQUEST) and is_numeric($_REQUEST['cycles']))
	$cycles = $_REQUEST['cycles'];
	
	echo "<form method=\"get\" action=\"".$file."\">\n";
	echo "<p>Using <input type=\"text\" name=\"operations\" value=\"". $operations. "\" /> operations over <input type=\"text\" name=\"cycles\" value=\"" . $cycles . "\" /> cycles.";
	echo "<input class=\"button\" type=\"submit\" value=\"recalculate\" /></p>\n";
	echo "</form>\n";

//tests for when an element/key is found
for($t=0; $t < $cycles; $t++) {
	//array key test
	$array_key_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		array_key_exists(8, $array_key);
	}
	$array_key_time += microtime(true)-$array_key_start;
	
	
	//in array  test
	$in_array_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		in_array(8, $array);
	}
	$in_array_time += microtime(true) - $in_array_start;

//slanty array  test
	$slanty_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		in_array(8, array_keys($array_key));
	}
	$slanty_time += microtime(true) - $slanty_start;
	
	
}

$ak = $array_key_time / $cycles;
$ia = $in_array_time / $cycles;
$sa = $slanty_time / $cycles;
$out = "<h1>Int Element/Key Found</h1>\n";
$out .= "<p".(($ak <= $ia)?" class=\"winner\"":"")."><strong>array_key_exists:</strong> " . ($ak) . "</p>";
$out .= "<p".(($ia <= $ak)?" class=\"winner\"":"")."><strong>in_array:</strong> " . ($ia) . "</p>";
$out .= "<p".(($sa <= min($ak, $ai))?" class=\"winner\"":"")."><strong>slanty:</strong> " . ($sa) . "</p>";
echo $out;
//not found

$array_key_time = 0;
$in_array_time = 0;
for($t=0; $t < $cycles; $t++) {
	
	
	//in array  test
	$in_array_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		in_array(99, $array);
	}
	$in_array_time += microtime(true) - $in_array_start;
	
	
	//array key test
	$array_key_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		array_key_exists(99, $array_key);
	}
	$array_key_time += microtime(true)-$array_key_start;

//slanty array  test
	$slanty_start = microtime(true);
	for($i=0; $i < $operations; $i++) {
		in_array(99, array_keys($array_key));
	}
	$slanty_time += microtime(true) - $slanty_start;

}

$ak = $array_key_time / $cycles;
$ia = $in_array_time / $cycles;
$sa = $slanty_time / $cycles;
$out = "<h1>Int Element/Key Not Found</h1>\n";
$out .= "<p".(($ak <= $ia)?" class=\"winner\"":"")."><strong>array_key_exists:</strong> " . ($ak) . "</p>";
$out .= "<p".(($ia <= $ak)?" class=\"winner\"":"")."><strong>in_array:</strong> " . ($ia) . "</p>";
$out .= "<p".(($sa <= min($ak, $ai))?" class=\"winner\"":"")."><strong>slanty:</strong> " . ($sa) . "</p>";

echo $out;

?>
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