bench.php

<?php

require "vendor/autoload.php";

class Foo {
    public function bar() {}
}

$c = 1000;

echo "using method_exists... ";
$t = microtime(true);
for($i = 0; $i < $c; $i++) {
    method_exists('Foo', 'bar');
}
echo (microtime(true) - $t) . " seconds.\n";




echo "using core reflection... ";
$t = microtime(true);
for($i = 0; $i < $c; $i++) {
    $r = new ReflectionClass('Foo');
    $r->hasMethod('bar');
}
echo (microtime(true) - $t) . " seconds.\n";




echo "using better reflection... ";
$t = microtime(true);
for($i = 0; $i < $c; $i++) {
    $br = \BetterReflection\Reflection\ReflectionClass::createFromName('Foo');
    $br->hasMethod('bar');
}
echo (microtime(true) - $t) . " seconds.\n";

result.txt

using method_exists... 0.0006260871887207 seconds.
using core reflection... 0.0013439655303955 seconds.
using better reflection... 7.447105884552 seconds.