node-mysql connection pooling

I am using node-mysql module (https://github.com/felixge/node-mysql) OR (http://utahjs.com/2010/09/22/nodejs-and-mysql-introduction/) . Is this API handling connection pooling as well? I mean with every user request I am calling Client.connect() to query the MySQL and to release the connection: Client.end(). Is this the right way, or should I connect/disconnect only once in a code. I am learning f