Okay...okay....I found this out by accident, but the reasoning makes PERFECT sense
As you all are probably painfully aware (Well, some of you anyway), the prompt box feature of WindowsXP which replaces the MS-DOS box feature of earlier Windows OSes is painfully slow. ...it is much MUCH slower than those in previous versions.
Well, sometimes I like to edit/70 a file and read through it really quickly by holding the PageDown key, but that is SOOO SLOW! It's like MOVE IT already!
Anyhow, as soon as, while I held the Page Down key down, I started moving the mouse around over the prompt box, BINGO! ....all of a sudden there was like a 10X speed increase
Now whenever I am using a program that is a prompt-based program, I just move the mouse around in the prompt box as it runs and it makes it run a LOT FASTER!
I am pretty sure the reason this is so is because Microsoft gave the prompt box LOW thread/task priority (They're hoping you won't be using too many DOS programs, see?

), so therefore, it seems that it gets unduly slow. However, once you move your mouse over it rapidly, Windows sends a bunch of WM_MOUSEMOVE messages to the prompt box program
In a nutshell unless your program actually uses mouse input, these tell the DOS box "get a move on, little doggie"
Hence, for those of you using WindowsXP, but that also like to use a lot of DOS programs as well, just move your mouse around in that prompt box while the program is running
Lemme know if this helped anyone
BTW.....you can test this out for yourself by taking any sufficiently large file (which is still small enough to be opened with the edit command), open it with edit/70
....and then hold the PageDown button and see how slow it goes, and then start moving your mouse around a lot in the prompt box while holding PageDown and witness the HUGE improvement

BTW, I just figured this out now, so
Credits to me if you want to post this on any website.