[Mono-list] [Off-topic] "if else" or "switch" ?

Fabien Meghazi agr@amigrave.com
Fri, 15 Oct 2004 16:35:04 +0200

Hi all,

I was wondering if mono would generate diferent code between a "switch"
and an "if else suite". I guess yes.
But I would like to know wich of the two code would be faster ?
(I know we are speaking of a few cpu cycles of difference, but I would like to
know anyway) I would have benchmark this but I've nothing to do this, and I
guess that this question could be theorically answered easily by those how
put their hand in mono compiler.

So which of those two methods generate faster code ?
PS: orientation is a string and the following code is in a for loop :
// --> for (int i = 0; i < orientation.Length; i++) 

Method 1
				switch (orientation[i]) {
					case 'l':
						left = true;
					case 'r':
						left = false;
					case 't':
						top = true;
					case 'b':
						top = false;

Method 2
				char or = orientation[i];
				if (or == 'l') left = true;
				else if (or == 'r') left = false;
				else if (or == 't') top = true;
				else if (or == 'b') top = false;

Fabien Meghazi