Sending multiple values(Array) from one page to other

Question

Hello Everybody, I want to send muliple values(Array values) from one page to other. I thing query string is not a solution. Session can be helpfull. But some of my seniors said do not use large number of Session. Is there any alternating way to avoid both session & query string to send array values. Please tell me the performance effectt of Query string, Session & alternate one Thanking You TusharP