I have written simple C code of around 4700 lines in freescale codewarrior in two ways. In both the ways number of lines and content are same. The code contains mostly if else loops. Style 1 takes compiler 40 seconds while Style 2 takes 10 seconds despite the same content. The details of the two styles are as follows:
Style 1
Most part of the code is written in a loop which is called each 10ms.
Style 2
Same as style 1 except the code is broken into 4-5 functions those are called in the same loop.
How compiler treats both the styles? Why style 2 takes significantly less time than style 1 ?