PHP Benchmark for array_search against foreach

array_search-benchmark.php

<?php
for($j = 0; $j < 10000; $j++) {
    //test with element at the beginning of the array
    $searchArray = array();
    $searchArray[] = $element = new stdClass();
    for($i = 0; $i < 100; $i++) {
        $searchArray[] = new stdClass();
    }
    $found = false !== array_search($element, $searchArray, true);

    //test with element at the center of the array
    $searchArray = array();
    for($i = 0; $i < 50; $i++) {
        $searchArray[] = new stdClass();
    }
    $searchArray[] = $element = new stdClass();
    for($i = 0; $i < 50; $i++) {
        $searchArray[] = new stdClass();
    }
    $found = false !== array_search($element, $searchArray, true);

    //test with element at the end of the array
    $searchArray = array();
    for($i = 0; $i < 100; $i++) {
        $searchArray[] = new stdClass();
    }
    $searchArray[] = $element = new stdClass();
    $found = false !== array_search($element, $searchArray, true);
}

foreach-benchmark.php

<?php
for($j = 0; $j < 10000; $j++) {
    //test with element at the beginning of the array
    $searchArray = array();
    $searchArray[] = $element = new stdClass();
    for($i = 0; $i < 100; $i++) {
        $searchArray[] = new stdClass();
    }
    foreach ($searchArray as $collectionElement) {
        if ($element === $collectionElement) {
            $found = true;
            break;
        }
    }

    //test with element at the center of the array
    $searchArray = array();
    for($i = 0; $i < 50; $i++) {
        $searchArray[] = new stdClass();
    }
    $searchArray[] = $element = new stdClass();
    for($i = 0; $i < 50; $i++) {
        $searchArray[] = new stdClass();
    }
    foreach ($searchArray as $collectionElement) {
        if ($element === $collectionElement) {
            $found = true;
            break;
        }
    }

    //test with element at the end of the array
    $searchArray = array();
    for($i = 0; $i < 100; $i++) {
        $searchArray[] = new stdClass();
    }
    $searchArray[] = $element = new stdClass();
    foreach ($searchArray as $collectionElement) {
        if ($element === $collectionElement) {
            $found = true;
            break;
        }
    }
}

Notes

Tested on PHP 5.3.8 on Mac OS 10.6.8.
These results are just micro-optimization, which is quite useless, but the foreach construct seems to be always slower than array_search.
I expected much better results, but I frankly don't know why I didn't get them this time. Unfortunately I don't have the previous benchmark anymore.

test results for "time"

Marco-Pivettas-MacBook-Pro:~ ocramius$ #all 3 cases
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search.php 

real	0m2.900s
user	0m2.872s
sys	0m0.012s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach.php 

real	0m3.115s
user	0m3.097s
sys	0m0.013s
Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element at the beginning of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search.php 

real	0m0.971s
user	0m0.951s
sys	0m0.010s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach.php 

real	0m0.948s
user	0m0.933s
sys	0m0.011s

Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element in the middle of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search.php 

real	0m0.983s
user	0m0.960s
sys	0m0.009s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach.php 

real	0m1.065s
user	0m1.048s
sys	0m0.012s

Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element at the end of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search.php 

real	0m0.978s
user	0m0.957s
sys	0m0.010s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach.php 

real	0m1.124s
user	0m1.109s
sys	0m0.010s

test results for time

Marco-Pivettas-MacBook-Pro:~ ocramius$ #all 3 cases
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search-benchmark.php

real	0m2.900s
user	0m2.872s
sys	0m0.012s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach-benchmark.php

real	0m3.115s
user	0m3.097s
sys	0m0.013s
Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element at the beginning of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search-benchmark.php

real	0m0.971s
user	0m0.951s
sys	0m0.010s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach-benchmark.php

real	0m0.948s
user	0m0.933s
sys	0m0.011s

Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element in the middle of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search-benchmark.php

real	0m0.983s
user	0m0.960s
sys	0m0.009s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach-benchmark.php 

real	0m1.065s
user	0m1.048s
sys	0m0.012s

Marco-Pivettas-MacBook-Pro:~ ocramius$ #just element at the end of the array
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php array_search-benchmark.php

real	0m0.978s
user	0m0.957s
sys	0m0.010s
Marco-Pivettas-MacBook-Pro:~ ocramius$ time php foreach-benchmark.php

real	0m1.124s
user	0m1.109s
sys	0m0.010s

@Ocramius, have you got by chance the results for PHP ^7.0?