Performance with Freeradius-1.1.4

Hi All, I am using freeradius-1.1.4 with PEAP-MSCHAPV2. Each session starting from Access-Request till Access-Accept it takes more than 250ms to complete. Is it the normal performance of freeradius-1.1.4 or anything suspicious in this regard? When i try to send many Request simultaneously then there is no response from the server for the latest requests as the server is busy processing first request. Only the first request gets response after 250ms. When i tried with some other RADIUS Server i could connect each mobile unit in some 150ms. Please let me know if anybody faced this problem with performance. Thanks, Nikitha