gistfile1.php

<?php

namespace console\controllers;

use yii\console\Controller;
use common\models\TestModel;

class LeakController extends Controller
{
    private function createModels($detach = true, $count = 10000)
    {
        for ($i = 0; $i != $count; ++$i) {
            $model = new TestModel();
            if ($detach) {
                $model->detachBehaviors();
            }
        }
    }

    public function actionTestModel()
    {
        $test = new TestModel(); // Create temporary object for loading TestModel.php etc.
        $time = microtime(true);
        $memory = -memory_get_usage();
        $this->createModels(true);
        echo "Usage of memory with detaching: " . (memory_get_usage() + $memory) . " bytes; Usage of time: " . (microtime(true) - $time) . " s" . PHP_EOL;

        $time = microtime(true);
        $memory = -memory_get_usage();
        $this->createModels(false);
        echo "Usage of memory without detaching: " . (memory_get_usage() + $memory) . " bytes; Usage of time: " . (microtime(true) - $time) . " s" . PHP_EOL;

        gc_collect_cycles();
        $time = microtime(true);
        $memory = -memory_get_usage();
        $this->createModels(false);
        gc_collect_cycles();
        echo "Usage of memory with gc_collect_cycles: " . (memory_get_usage() + $memory) . " bytes; Usage of time: " . (microtime(true) - $time) . " s" . PHP_EOL;
    }
}