XAMPP BETA 13:缓慢的mysql连接

I just installed a fresh xampp beta 13 installation however I noticed in my zend application profiler that connect to mysql database is so slow. I have refreshed many times but same slow result.

1020.84ms   connect
0.39ms  SELECT `tipo_usuario`.* FROM `tipo_usuario`
0.40ms  SELECT `palestra`.* FROM `palestra` ORDER BY `hora_inicio_prevista` asc

One friend has tested same application on other machine and It is normal, connect in less than 50 ms. I am using pdo mysql dll driver version 5.4.4.0, Client API version mysqlnd 5.0.10 - 20111026.

My environment: Apache/2.4.2 (Win32) OpenSSL/1.0.1c PHP/5.4.4

Any idea why connecting is slow?

As discussed in the comments: changing localhost to 127.0.0.1 in the connection function often solves connection issues with PDO. Here is a thread that covers this topic on more detail.