- memory_get_usage: documentation ( source)
<?php
$row = 0;
$dest = [];
$a = 1;
while ($row < 2000000) {
$dest[] = [
$a,
1,
];
if ($row % 100000 === 0) {
echo (memory_get_usage(true) / 1000000) . PHP_EOL;
}
$row++;
}