re-using arrays

I would like to have my table of results sortable by various fields. Similar to www.mysimon.com Would it be faster for me to re-use an array rather than connecting to the DB again, select the same info, and send it again? If so how would you go about this? I would think that you could store the array in a session when you originally select it. But then it seems to me that if people do not re-sort items as often as you think then you would end up wasting bandwidth and pissing people off (slowing page load time) by resending the array each page. something like this: session_start(); session_register('last_search'); $last_search = $result_of_query Any thoughts? I was just thinking that once the client has the results on his/her machine, then there should be no need to reconnect to the DB (unless the search is different) Thanks much, olinux