note 102728 deleted from class.arrayobject by danbrown

Note Submitter: schultz dot peter at hotmail dot com 

----

I was unable to reproduce skrebbel's benchmarks in PHP 5.3.0 on Fedora x86. My benchmarks showed, that foreach iterations over ArrayObjects take about 160 to 175 % of the time of a foreach iteration over an array, nowhere near 20000%. Maybe the performance was improved since skrebbel's post, maybe one of our benchmarks was just badly written.

array  fill         : 0.236281
array  read         : 0.254270
array  iterate      : 0.023582

object fill         : 0.221212
object read         : 0.253145
object iterate      : 0.040560

Code to reproduce:

<?php
require_once "Benchmark/Timer.php";

$bench = array();
$profile = array();
$timer = new Benchmark_Timer(true);

$recordBenchmark = function($stepName) use(&$profile, &$timer) {
    $timer->setMarker($stepName);
    $benchmark = end($timer->getProfiling());
    $profile[$stepName] = $benchmark['diff'];
};

$benchSize = 100000;

foreach(array('array', 'object') as $type) {
    $timer->setMarker('type benchmark start');

    for ($i = 0; $i < $benchSize; $i++) {
        $bench["-$i"] = "$i";
    }
    $recordBenchmark("$type fill");

    for ($i = 0; $i < $benchSize; $i++) {
        $dummy = $bench["$i"];
    }
    $recordBenchmark("$type read");

    foreach($bench as $key => $value) {
    }
    $recordBenchmark("$type iterate");

    $bench = new ArrayObject();
}

foreach($profile as $step => $time) {
    printf("%-20s: %f\n", $step, $time);
}

?>