<?php

function benchmark ($args, $reps = 100000) {
    foreach ($args as $name => $fn) {
        $start = microtime(true);

        for ($i = $reps; $i--; ) {
            $fn();
        }

        echo $name, ': ', microtime(true) - $start, "s\n";
    }
}

$myArray = array (
    (object) array ('id' => 88, 'label' => 'Bus'),
    (object) array ('id' => 91, 'label' => 'Submarine'),
    (object) array ('id' => 92, 'label' => 'Boat')
);

benchmark(array(
    'lonesomeday' => function() use ($myArray) {
        $value = '';
        foreach ($myArray as $el) {
            if ($el->id === 91) { // or other number
                $value = $el->label;
                break;
            }
        }
    },
    'AJ' => function() use ($myArray) {
        $objects = array_filter($myArray, function($item){ return $item->id == 91; });
        $ret = array_shift($objects);
    }
), 1000000);