From the config file:
frameskip -- How many frames dosbox skips before drawing one.
So by the way I understand it, DOSBox will skip x number of frames before drawing 1 frame, then skip x number of frames... and so on.
Well, let's say we're playing DOOM (which is capped at 35fps) and we're getting poor performance. We set frameskip to 1. Now the game plays at ~18fps. Let's set it to 2: ~12fps. Let's set it to 3: ~9fps. See the problem?
The game gets more and more choppy as you increase the value. DOSBox looks more at skipping frames rather than showing them. A setting of 1 as we can see cuts displayed frames in half!
I propose this: being able to choose x number of frames to be displayed BEFORE x numer of frames are skipped. A setting of 4 frames displayed before 1 frame is skipped will display 80% of the frames, improving performance as well as improving playability.
This is something I have been waiting for in a future release, but seeing as no one has really thought of this, (or posted it as far as I know) I figure I should bring this up.