Writing to window vs frame

I have this script that writes out a lot of data to a web page on the fly based on a database query. I built in an option for them to open it into a new window instead of writing to one of the frames. However what writes to the frame in a reasonable amount of time is incredibly slow to a new browser window, in fact it works at my office but at home it locks up my system, and when I had a friend try it, it locked up his system as well. Its using exactly the same code the only difference one references via a frame the other references via opener. Is this a normal thing, that a new window takes that much longer to load then a frame? Any thoughts are appreciated. Ken