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My teacher in c++ told me that call by reference should only be used if I’m not going to change anything on the arrays inside the function.
I have some really big vectors that I’m passing around in my program. All the vectors will be modified inside the functions. My matrices are of sizes about [256*256][256][50]…
Is there some particular reason not to use call-by reference here?
AFAIK call by reference should be way faster and consume less memory?
It should be used when you are not changing something inside the function or you change things and want the changes to be reflected to the original array or don’t care about the changes to be reflected in the original array.
It shouldn’t be used if you don’t want your function to change your original array (you need to preserve the original values after the call) and the callee function changes the values of the passed argument.