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Last active December 3, 2025 10:07
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Array emptyness check benchmark
Raw
results.md

$ php8.4 test.php

Check emptyness of 1 million empty arrays 
    with empty($array): 0.0091989040374756
    with count($array) === 0: 0.01491904258728
    with [] === $array: 0.012963056564331

Check emptyness of 1 million non-empty arrays 
    with empty($array): 0.011882781982422
    with count($array) === 0: 0.016752004623413
    with [] === $array: 0.019222021102905

$ php8.5 test.php

Check emptyness of 1 million empty arrays 
    with empty($array): 0.0097339153289795
    with count($array) === 0: 0.01529598236084
    with [] === $array: 0.012676000595093

Check emptyness of 1 million non-empty arrays 
    with empty($array): 0.012006998062134
    with count($array) === 0: 0.017817974090576
    with [] === $array: 0.019315958023071
Raw
test.php
<?php
$emptyArrays = array_fill(0, 1_000_000, []);
$filledArrays = array_fill(0, 1_000_000, [1,2,3]);
echo 'Check emptyness of 1 million empty arrays '.PHP_EOL;
$time = microtime(true);
foreach ($emptyArrays as $emptyArray) {
empty($emptyArray);
}
echo ' with empty($array): '.(microtime(true)-$time).PHP_EOL;
$time = microtime(true);
foreach ($emptyArrays as $emptyArray) {
count($emptyArray) === 0;
}
echo ' with count($array) === 0: '.(microtime(true)-$time).PHP_EOL;
$time = microtime(true);
foreach ($emptyArrays as $emptyArray) {
[] === $emptyArray;
}
echo ' with [] === $array: '.(microtime(true)-$time).PHP_EOL;
echo PHP_EOL.'Check emptyness of 1 million non-empty arrays '.PHP_EOL;
$time = microtime(true);
foreach ($filledArrays as $array) {
empty($array);
}
echo ' with empty($array): '.(microtime(true)-$time).PHP_EOL;
$time = microtime(true);
foreach ($filledArrays as $array) {
count($array) === 0;
}
echo ' with count($array) === 0: '.(microtime(true)-$time).PHP_EOL;
$time = microtime(true);
foreach ($filledArrays as $array) {
[] === $array;
}
echo ' with [] === $array: '.(microtime(true)-$time).PHP_EOL;
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