<?php $a1 = array_fill(0, 100000, true); foreach($a1 as $k => $v){ unset($a1[$k]); } var_dump(memory_get_usage()); $a2 = array_map(function($v){ return $v; }, $a1); // capacity is trimmed down. how many resizes are performed? unset($a1); var_dump(memory_get_usage()); $a2[] = true; var_dump(memory_get_usage());
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