Zend_Currency: Exceptionally slow instantiation.

On my local testing environment I've noticed that simply instantiating Zend_Currency takes exceptionally long (1.5 - 2 seconds).

Examples:

$currency = new Zend_Currency('en_US'); // takes 1.5 - 2 seconds.

I'm running PHP 5.2.1 with the latest snapshot on Mac OS X 10.4.1.  Any ideas?