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 from this document: https://github.com/felixge/node-mysql/blob/master/Readme.md