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@ 2020-11-18T17:39:14Z

<?php

$arr = [];

for ($i = 0; $i < 100; $i++) {
    $val = [];
    $val[] = null;
    $val[] = null;
    $arr[] = $val;
    var_dump(memory_get_usage());
}

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
memory_get_usage: documentation ( source)

preferences:dark modelive preview

37.89 ms | 402 KiB | 5 Q