Scrolling through a list of records in RENXT is painful as not enough records are prefetched. When you get to the end of what is being displayed only a few more records are grabbed. The application should be intelligent enough that it's always grabbing 10 or 20 records ahead when you get near the bottom of your scroll.
Surely there is a coding fix that would begin to load the next batch of records in a list as soon as you start scrolling through the current group. This would create a more seamless scrolling experience and significantly speed up the process.