Benchmark of calling ReflectionMethod::getParameters

reflection_method_get_parameters_benchmark.php

<?php

ini_set('memory_limit', '-1');

$n = 1000000;

class A {}
class B {}
class C {}
class D {}
class E {}
class F {}
class G {}
class H {}
class I {}
class J {}

class Foo
{
    public function bar(A $a, B $b, C $c, D $d, E $e, F $f, G $g, H $h, I $i, J $j)
    {
        // ..
    }
}

$foo = new Foo();

$times = [];
for ($i = 0; $i < $n; $i++) {
    $start = microtime(true);

    $ref = new ReflectionMethod($foo, 'bar');
    $params = $ref->getParameters();

    $end = microtime(true);
    $times[] = $end - $start;
}

$avg = array_sum($times) / $n;
echo "Average of $n: " . number_format($avg, 10) . " sec, or " . number_format($avg * 1000000, 10) . " usec\n";

sample_output.txt

Average of 1000000: 0.0000090445 sec, or 9.0445024967 usec

Sample benchmark ran on:

PHP 5.6.16 (cli) (built: Nov 27 2015 10:28:34)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies