Benchmark `method_exists`

benchmark.php

<?php

include 'Benchmark.php'; // https://github.com/BruceJillis/Benchmark

class Author {
    public $firstName;
    protected $lastName;
    public function __construct($firstName, $lastName) {
        $this->firstName = $firstName;
        $this->lastName = $lastName;
    }
    public function getLastName() {
        return strtoupper($this->lastName);
    }
}

$author = new Author('John', 'Doe');

// ---------------------------------------------------------------------------

$benchmark = new Benchmark();
$benchmark->start('get_class_methods');

for ($i = 0; $i < 10000000; $i++) {
    in_array('getLastName', get_class_methods($author));
}

$benchmark->stop('get_class_methods');
$benchmark->start('method_exists');

for ($i = 0; $i < 10000000; $i++) {
    method_exists($author, 'getLastName');
}

$benchmark->stop('method_exists');
$benchmark->start('static method_exists');

for ($i = 0; $i < 10000000; $i++) {
    method_exists('Author', 'getLastName');
}

$benchmark->stop('static method_exists');
$benchmark->start('is_callable');

for ($i = 0; $i < 10000000; $i++) {
    is_callable($author, 'getLastName');
}

$benchmark->stop('is_callable');
$benchmark->start('static is_callable');

for ($i = 0; $i < 10000000; $i++) {
    is_callable('Author', 'getLastName');
}

$benchmark->stop('static is_callable');
$benchmark->start('hasMethod');

$refclass = new \ReflectionObject($author);

for ($i = 0; $i < 10000000; $i++) {
    $refclass->hasMethod('getLastName');
}

$benchmark->stop('hasMethod');
$benchmark->start('hasMethod (wo/new)');

for ($i = 0; $i < 10000000; $i++) {
    $refclass->hasMethod('getLastName');
}

$benchmark->stop('hasMethod (wo/new)');

$benchmark->display();

#                      | time    | memory |
# get_class_methods    | 31.92 s | 768 B  |
# is_callable          | 17.29 s | 512 B  |
# hasMethod (wo/new)   | 16.55 s | 488 B  |
# hasMethod            | 16.53 s | 832 B  |
# static method_exists | 16.51 s | 488 B  |
# static is_callable   | 15.45 s | 488 B  |
# method_exists        | 15.34 s | 488 B  |