Benchmarking dependency injection techniques in PHP

results.txt

Test 1: Setting a public property directly
    - 1000000 iterations in 0.49191880226135ms

Test 2: Setting a private property via setter method
    - 1000000 iterations in 11.216212034225ms

Test 3: Setting a private property via Reflection
    - 1000000 iterations in 11.286839008331ms

Test 4: Setting a protected property via Reflection
    - 1000000 iterations in 11.307084083557ms

run-me.php

<?php

class TestClass {

    public $myPublicProperty;
    protected $myProtectedProperty;
    private $myPrivateProperty;


    public function setMyPrivateProperty($p){
        $this->myPrivateProperty = $p;
    }

}



/*
 * TEST 1 - Setting a public property directly
 */
echo "Test 1: Setting a public property directly\n";
$k = 0;
$start = microtime(true);
while($k<1000000){
    $myClass = new TestClass();
    $myClass->myPublicProperty = 'foo';
    ++$k;
}
$time = microtime(true) - $start;
echo "    - $k iterations in {$time}ms\n\n";


/*
 * TEST 2 - Setting a private property via a setter
 */
echo "Test 2: Setting a private property via setter method\n";
$k = 0;
$start = microtime(true);
while($k<1000000){
    $myClass = new TestClass();
    $myClass->setMyPrivateProperty('foo');
    ++$k;
}
$time = microtime(true) - $start;
echo "    - $k iterations in {$time}ms\n\n";


/*
 * TEST 3 - Setting a public property directly
 */
echo "Test 3: Setting a private property via Reflection\n";
$refl = new ReflectionClass('TestClass');
$privateProperty = $refl->getProperty('myPrivateProperty');
$privateProperty->setAccessible(true);
$k = 0;
$start = microtime(true);
while($k<1000000){
    $myClass = new TestClass();
    $privateProperty->setValue($myClass,'foo');
    ++$k;
}
$time = microtime(true) - $start;
echo "    - $k iterations in {$time}ms\n\n";


/*
 * TEST 4 - Just out of interest, what about protected properties?
 */
echo "Test 4: Setting a protected property via Reflection\n";
$refl = new ReflectionClass('TestClass');
$protectedProperty = $refl->getProperty('myProtectedProperty');
$protectedProperty->setAccessible(true);
$k = 0;
$start = microtime(true);
while($k<1000000){
    $myClass = new TestClass();
    $protectedProperty->setValue($myClass,'foo');
    ++$k;
}
$time = microtime(true) - $start;
echo "    - $k iterations in {$time}ms\n\n";