API Calls & Framework... IDK

Inexperienced programmer (just started a week ago, no shit I'm just now understanding why classes rock so hard.). If making API calls to linked libraries in statically compiled binaries is faster than using a framework that uses JiT compilation... why do so many people push for the framework and JiT compilation?

I'm not trying to start anything, but I'm seriously curious as to why the later is the preferred choice.

Okay, really quick... I something. Common Lisp. Which I'm assuming is different from Scheme Lisp(./?) Is there any kind of chart or list that you guys know of with all the different versions of Lisp and there differences, cause its sweet and so easy.

[I tied looking at the wiki, but that only had who started Lisp and like a Lisp biography]