<?php class A { public array $foo = ['baz' => 10]; public int $bar { get => $this->foo['baz']; set { $this->foo['baz'] = $value; //$this->bar = $value; } } public function __sleep() { return ['foo']; //array_keys(get_object_vars($this)); } } $a = new A; $a->bar = 20; var_dump(unserialize(serialize($a))->bar);
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Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).