access_performance_tests.php

<?php

class MyClass
{
    private $foo;

    public function setFoo($foo)
    {
        $this->foo = $foo;
    }

    public function getFoo()
    {
        return $this->foo;
    }
}

$myClass = new MyClass();

$count = 1000000;

$startTime = microtime(true);
for ($i = 0; $i < $count; $i++) {
    $myClass->setFoo(1);
    $foo = $myClass->getFoo();
}
$endTime = microtime(true);
echo 'Setters/getters: ', $endTime - $startTime, PHP_EOL;

$startTime = microtime(true);
for ($i = 0; $i < $count; $i++) {
    $r = new ReflectionClass('MyClass');
    $p = $r->getProperty('foo');
    $p->setAccessible(true);
    $p->setValue($myClass, 1);
    $foo = $p->getValue($myClass);
}
$endTime = microtime(true);
echo 'Reflection: ', $endTime - $startTime, PHP_EOL;

$startTime = microtime(true);
for ($i = 0; $i < $count; $i++) {
    Closure::bind(function () {
        $this->foo = 1;
        $foo = $this->foo;
    }, $myClass);
}
$endTime = microtime(true);
echo 'Closure: ', $endTime - $startTime, PHP_EOL;