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gavinkalika/array_versus_generators.php

Created March 29, 2023 02:26
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Comparing the PHP 8.2 memory performance between array and generators
Raw
array_versus_generators.php
<?php
$size = 100000;
$startTime = microtime(true);
$memoryStart = memory_get_usage();
$array = range(1, $size);
$sum = 0;
foreach ($array as $value) {
$sum += $value;
}
$memoryEnd = memory_get_usage();
$endTime = microtime(true);
echo "Foreach Loop: Execution Time: " . ($endTime - $startTime) . " seconds\n";
echo "Foreach Loop: Memory Usage: " . ($memoryEnd - $memoryStart) . " bytes\n\n";
$startTime = microtime(true);
$memoryStart = memory_get_usage();
function createGenerator($size, $array) {
foreach($array as $v) {
yield $v;
}
}
$generator = createGenerator($size, range(1, $size));
$sum = 0;
foreach ($generator as $value) {
$sum += $value;
}
$memoryEnd = memory_get_usage();
$endTime = microtime(true);
echo "Generator: Execution Time: " . ($endTime - $startTime) . " seconds\n";
echo "Generator: Memory Usage: " . ($memoryEnd - $memoryStart) . " bytes\n";
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