Quick Time Screen recording really choppy/ bad frame rate.

So when i record my screen using other programs everything is smooth and the video moves at the same speed as real time, but when i record using Quick time then the video is very laggy and the frame rate is really bad and things are just jumping around a lot.

Is Quck Time just not capable of Screen recording complex things? is it only capable of recording microsoft word? lol.

If someone can hep me use Qucik time to record me screen then that would be great, cause with the way it is now there simply is no point to using it at all cause it doesnt record the screen very well, it just lags and everything jumps around to much. Its like watching a slide show where the pictures change every 2 sec rather than a video.