declaring new variables within a switch statement

hello,

does anyone know if declaring new variables within a switch statement (inside of case: break;) actually creates new variables inside those switch statements, or are the variable declarations moved to the top of the function when compiled?

i know that when declaring new variables inside a for or while loop, the compiler declares those variables at the beginning of the function. is it the same for if or switch statements?

Is this a question of how the compiler works, or whether you'd have access to the newly declared variable within the scope of the function, after the switch-case, for use in returning or for some other purpose?

i'm wondering how the compiler works... mainly, if i have a huge switch statement full of tons of different cases and each creates a lot of new variables within, does it heavily slow down the main program, or just each separate case branch?

I'm not much of an engineer when it comes to this type of stuff, so I really can't answer that question. Wish I could help!

I'm sure someone will come along and take a look eventually and have an answer for you. =)