<?php

$objArr = Region::find()->all();
		$iterations = 250;

		$i = 0;
		$result = [];
		$start1 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			foreach ($objArr as $obj) {
				$result[] = $obj->id;
			}
		}
		$end1 = microtime(true);
		unset($result);

		$i = 0;
		$result = [];
		$start2 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$result = ArrayHelper::getColumn($objArr, 'id');
		}
		$end2 = microtime(true);
		unset($result);

		$i = 0;
		$result = [];
		$start3 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$result = array_map(function ($x) {
				return $x->id;
			}, $objArr);
		}
		$end3 = microtime(true);
		unset($result);

		$d1 = $end1 - $start1;
		$d2 = $end2 - $start2;
		$d3 = $end3 - $start3;

		$result = [];
		$start1 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$result = [];
			foreach ($objArr as $obj) {
				$result[] = $obj->id;
			}
		}
		$end1 = microtime(true);
		unset($result);

		$i = 0;
		$result = [];
		$start2 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$result = ArrayHelper::getColumn($objArr, 'id');
		}
		$end2 = microtime(true);
		unset($result);

		$i = 0;
		$result = [];
		$start3 = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$result = array_map(function ($x) {
				return $x->id;
			}, $objArr);
		}
		$end3 = microtime(true);
		unset($result);

		$d1 += $end1 - $start1;
		$d2 += $end2 - $start2;
		$d3 += $end3 - $start3;
		$arr = ['normal' => $d1, 'arrhelper' => $d2, 'map' => $d3];
		asort($arr);
		echo(json_encode($arr));