$ php in_array_vs_isset_vs_array_key_exists.php
Function call in_array took 1.51871 seconds
Function call isset took 0.14684 seconds
Function call array_key_exists took 0.22123 seconds
Forked from alcaeus/in_array_vs_isset_vs_array_key_exists.php
Created
February 4, 2025 02:48
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Performance comparision: in-array vs. isset vs. array_key_exists
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<?php declare(strict_types = 1); | |
function testPerformance($name, Closure $closure, $runs = 1000000) | |
{ | |
$start = microtime(true); | |
for (; $runs > 0; $runs--) | |
{ | |
$closure(); | |
} | |
$end = microtime(true); | |
printf("Function call %s took %.5f seconds\n", $name, $end - $start); | |
} | |
$items = [1111111]; | |
for ($i = 0; $i < 100000; $i++) { | |
$items[] = rand(0, 1000000); | |
} | |
$items = array_unique($items); | |
shuffle($items); | |
$assocItems = array_combine($items, array_fill(0, count($items), true)); | |
$in_array = function () use ($items) { | |
in_array(1111111, $items); | |
}; | |
$isset = function () use ($assocItems) { | |
isset($items[1111111]); | |
}; | |
$array_key_exists = function () use ($assocItems) { | |
array_key_exists(1111111, $assocItems); | |
}; | |
testPerformance('in_array', $in_array, 100000); | |
testPerformance('isset', $isset, 100000); | |
testPerformance('array_key_exists', $array_key_exists, 100000); |
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