How much faster would my C program be if

I skipped all the function bullshit and just used main() for everything and used goto in an BASIC line number fashion?

You'd probably lose all optimization, so you'd actually be losing speed.

>>2
FUCK OFF

>>1
You might as well use assembly if you will forgo functions, which is major main point of High level languages.

>>1
>>2

It's like what happened when the macbook air came out with flash-only drives. Performance was notably worse. Why?

Because current filesystems had decades of ``optimized cruft'' for spinning magnetic hard drives. So, basically the same story for your code and clang/gcc.

muh branch prediction

>>5
I am surprised someone still remembers that, and has the guts share to share, as an analogy. Thanks, really.

For maybe some simple applications you'd get a small performance boost, but in larger applications, due to the difficulty of programming, you'd probably fuck up and get a performance hit. Not really worth it IMO.