Cursor via html in VS lags

If I have a decent sized asp.net page open in Source view and hold the Up or Down key to scroll through it, it will periodically get stuck. It will stop on the line for a few microseconds and you can see the screen flash as if she's trying to catch up with what she's trying to do behind the scenes. In my dual monitor setup, I am running on monitor 2 and you can see the desktop icons on monitor 1 flash. This is annoying because I always cross lines and have to move back and forth, constantly correcting the lag. Any idea what it does when I cursor through the code? Is there anything I can turn off to prevent this from happening? (Slowing down my key repetition rate is not an option.)