Slowness of the system when entering data.

I do a lot of large productions involving several hundred people on a film or TV show title, and I've found that the more people there are in the credits (if you add a name), the longer it takes the system to 1: access the page by clicking on the “modify” option, and 2: enter the name. The “Loading, please wait” message can take up to 20 seconds before acceptance every time, which is a very long time when you enter at least 30,000 data entries per year. The wait is interminable, and very discouraging. And that's on any computer I've tried, so it's really the IMDB system and not related to the computer's functionality. Is it possible to fix this situation? Because it would be a great help in encouraging us to put more data on the site, because sometimes this detail is so discouraging that we give up because of it. Let's just say you have to be VERY patient. Thanks