Benchmark ArrayAccess vs. Magic Methods __get/__set() in PHP classes

benchmark.php

<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);

class Test implements ArrayAccess
{
    public $data = array();
    public function __set($key, $value){
        $this->data[$key] = $value;
    }
    public function set($key, $value){
        $this->__set($key, $value);
    }
    public function __get($key){
        return $this->data[$key];
    }
    public function get($key){
        return $this->__get($key);
    }
    public function offsetExists($offset) {
    }
    public function offsetGet($offset) {
        return $this->__get($offset);
    }
    public function offsetSet($offset, $value) {
        $this->__set($offset, $value);
    }
    public function offsetUnset($offset) {
    }
}

if (php_sapi_name() !== 'cli') {
    echo "<pre>\n";
}

$iterations = pow(10,6);
echo "Running $iterations iterations...\n";

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = new Test;
    $test["a"] = "test a";
    $test["b"] = "test b";
    $test["c"] = "test c";
    $temp      =  $test["a"];
    $temp      =  $test["b"];
    $temp      =  $test["c"];
}
printf("\r%7.0f/s Test[key]=value (array access)\n", $iterations/(microtime(true)-$time));

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = new Test;
    $test->__set("a", "test a");
    $test->__set("b", "test b");
    $test->__set("c", "test c");
    $temp    =  $test->__get("a");
    $temp    =  $test->__get("b");
    $temp    =  $test->__get("c");
}
printf("\r%7.0f/s Test->__set(key,value) (function call)\n", $iterations/(microtime(true)-$time));

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = new Test;
    $test->set("a", "test a");
    $test->set("b", "test b");
    $test->set("c", "test c");
    $temp    =  $test->get("a");
    $temp    =  $test->get("b");
    $temp    =  $test->get("c");
}
printf("\r%7.0f/s Test->set(key,value) (function call)\n", $iterations/(microtime(true)-$time));

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = new Test;
    $test->a = "test a";
    $test->b = "test b";
    $test->c = "test c";
    $temp    = $test->a;
    $temp    = $test->b;
    $temp    = $test->c;
}
printf("\r%7.0f/s Test->key=value (Object property)\n", $iterations/(microtime(true)-$time));

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = new stdClass;
    $test->a = "test a";
    $test->b = "test b";
    $test->c = "test c";
    $temp    = $test->a;
    $temp    = $test->b;
    $temp    = $test->c;
}
printf("\r%7.0f/s stdClass->key=value (original)\n", $iterations/(microtime(true)-$time));

echo 'Working...';
$time = microtime(true);
for ($i=0; $i < $iterations; $i++) {
    $test = array();
    $test["a"] = "test a";
    $test["b"] = "test b";
    $test["c"] = "test c";
    $temp      =  $test["a"];
    $temp      =  $test["b"];
    $temp      =  $test["c"];
}
printf("\r%7.0f/s Array[key]=value (original)\n", $iterations/(microtime(true)-$time));