README.md

This piece of code tries to reduce the performance overhead needed to populate an object's properties via reflection.

An example of its usage can be found at http://3v4l.org/he2dF

Foo.php

<?php

class Foo
{
    protected $foo;
    protected $bar;
    protected $baz;
}

FooSelfHydratingProxy.php

<?php

class FooSelfHydratingProxy extends Foo implements HydratorInterface
{
    /** zero-argument constructor since this is just a helper class for hydration */
    public function __construct()
    {
    }
    
    /**
     * the `Foo` typehint is not part of the interface - here only for the sake of readability/clearness
     */
    public function hydrate($data, Foo $object)
    {
        $object->foo = $data['foo'];
        $object->bar = $data['bar'];
        $object->baz = $data['baz'];
    }

    /**
     * the `Foo` typehint is not part of the interface - here only for the sake of readability/clearness
     */
    public function extract(Foo $object)
    {
        return array('foo' => $object->foo, 'bar' => $object->bar, 'baz' => $object->baz);
    }
}

hydrator-performance.php

<?php

$iterations = 100000;

class A {protected $a; protected $b; protected $c;}
class AHydrator extends A {
    public function hydrate(A $a, array $data)
    {
        $a->a = $data['a'];
        $a->b = $data['b'];
        $a->c = $data['c'];
    }
}

$data = array('a' => 1, 'b' => 2, 'c' => 3);
$a = new A();
$h = new AHydrator();

for ($i = 0; $i < $iterations; $i++) {
    $h->hydrate($a, $data);
}

reflection-performance.php

<?php

$iterations = 100000;

class A {protected $a; protected $b; protected $c;}

$rA = new ReflectionProperty('A', 'a');
$rB = new ReflectionProperty('A', 'b');
$rC = new ReflectionProperty('A', 'c');

$rA->setAccessible(true);
$rB->setAccessible(true);
$rC->setAccessible(true);

$data = array('a' => 1, 'b' => 2, 'c' => 3);
$a = new A();

for ($i = 0; $i < $iterations; $i++) {
    $rA->setValue($a, $data['a']);
    $rB->setValue($a, $data['b']);
    $rC->setValue($a, $data['c']);
}