PHP Infusionsoft SDK - very slow initialization

test.php

<?php

// Infusionsoft Domain for connection
define('INFUSIONSOFT_DOMAIN', 'zhXXX');
define('INFUSIONSOFT_KEY', 'XXXXXXXXXXXXXXXXXXXXXX');



// get the isdk and other required files
require_once 'lib/iSDK-new/src/isdk.php';



$app = new ISDK;
$app->enableLogging(1);
$app->cfgCon(INFUSIONSOFT_DOMAIN);

die("HELLO");

/** 
Output:

$ time php test.php 
PHP Notice:  Undefined index: SERVER_NAME in /home/ubuntu/infusionsoft-testing/lib/iSDK-new/src/xmlrpc-3.0/lib/xmlrpc.inc on line 38
HELLO
real	0m15.774s
user	0m0.048s
sys	0m0.072s

--
Does anyone have ideas why this is so slow? 


$ php -v
PHP 5.4.6-1ubuntu1.4 (cli) (built: Sep  4 2013 19:36:09) 
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies



*/