Talk:While

How is it that a do loop is faster than a while loop? I wrote some code to test this and they look equal to me.Lowrez Resident 14:58, 7 August 2013 (PDT)

The while loop in the LSO compiler produces the following output for the various loop types. That is unless they decided to do a little optimizing (they were NEVER going to optimize LSO).

//while loop
test:
if(condition)false jump end; //6 bytes (1 for bytecode, 1 for type designation for conditional, 4 bytes for jump offset).
//loop body goes here
jump test;//5 bytes (1 for bytecode, 4 bytes for jump offset).
end:

//do-while loop
start:
//loop body goes here
if(condition)true jump start;//6 bytes (1 for bytecode, 1 for type designation for conditional, 4 bytes for jump offset).

As you can see, for each loop iteration the while loop executes two bytecodes while the do-while executes only one. Of course LL could have fixed this by rewriting the while as follows:

jump test;//5 bytes (1 for bytecode, 4 bytes for jump offset).
start:
//loop body goes here
test:
if(condition)true jump start;//6 bytes (1 for bytecode, 1 for type designation for conditional, 4 bytes for jump offset).

--Strife ^{(talk|contribs)} 18:10, 7 August 2013 (PDT)