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<?php class NonLeakingClass { protected $x=[1,2,3,4,5,6,7,8,9,10]; public function __counstruct(){ } } class NonLeakingClass2 { protected $x=[1,2,3,4,5,6,7,8,9,10]; public function __counstruct(){ } } function test($x){ $ret = []; for($i=0;$i<(1022/2)*$x;$i++){ $ret[] = new NonLeakingClass(); $ret[] = new NonLeakingClass2(); } return $ret; } for ($h = 1; $h < 5; $h++) { echo "test $h \n\n"; var_dump(memory_get_usage(false)); $a = test($h); unset($a); gc_collect_cycles(); var_dump(memory_get_usage(false)); } exit;