<?php

/*
   output:
     results, fastest first:
     method_call          0.0907 152.0000
     function_call        0.0954 584.0000

   method calls are insignificantly faster - but use (a lot) less memory, for some reason
*/

if (extension_loaded('xdebug')) {
    echo "WARNING: xdebug is enabled\n";
}

class Container {
    public $foo = null;
    public function __construct()
    {
        $this->foo = new Foo();
    }
}

class Foo {
    public function method_call(){ return "something"; }
    public static function function_call(){ return "something"; }
}

$container = new Container();

function function_call()
{
    global $container;
    Foo::function_call();
}

function method_call()
{
    global $container;
    $container->foo->method_call();
}

$data = array();
$functions = array(
    'function_call',
    'method_call',
);

$res = array();
$mem = array();
foreach( $functions as $k )
{
    $iterations = 100000;
    $rest = array();
    $t = memory_get_usage();
    //ob_start();
    $start = microtime(true);
    while (--$iterations) {
        $k();
    }
    $end = microtime(true);
    //ob_get_clean();
    $res[$k] = $end - $start;
    $mem[$k] = memory_get_usage() - $t;
}

echo "results, fastest first:\n";
asort($res);
foreach ($res as $k => $d) {
    printf("%-20s %0.4f %0.4f\n", $k, $d, $mem[$k]);
}