Answer 1

pass by reference is faster, because values are not copy unlike pass by value

Answer 2

A reference is a pointer in disguise. A normal pointer has eight bytes. So when it's a small value like an int, cbv should be faster.
This is from my noob perspective - I should read up on these links next. ;-)

Answer 3

https://www.sololearn.com/discuss/1072418/?ref=app
https://www.sololearn.com/discuss/1369622/?ref=app
https://www.sololearn.com/discuss/117399/?ref=app
https://www.sololearn.com/discuss/221292/?ref=app

Answer 4

Obviously pass by reference!
Since it uses only the address not the actual value .
It uses less memory and eventually becomes faster👍🏻

Answer 5

No copying of values is required in pass by reference (other than copying of an address). Hence for larger data structures, pass by reference is faster. If you want to change the value of a variable within a function, pass by reference or pointer (thanks HonFu) are the only options.

Answer 6

Pass by pointer is another.

Answer 7

By reference it is faster for several reasons, essentially, because the copy of fact requires also finding the reference of a value to copy it, besides the copy process is linear in dependence of the length bytes of the data type that is being copied, while that the reference has a fixed length. But sometimes a copy of value is required so as not to affect the original variable and respect its scope. I do not think any one is better than another. But reference if it is faster.

Answer 8

If your data is a basic data type (int, float, etc.) both will be equally fast. Pass by value is a tad faster as you don't need a level of indirection when you access the passed data.
If your data is a big fat struct, pass by reference will be faster as you don't have to copy the whole struct before passing it, you just pass a pointer to it.
so it is better to pass scalars by value and classes/structs by reference.
For more info you can refer this link.
https://www.quora.com/Which-is-faster-in-runtime-and-efficient-memory-pass-by-value-or-pass-by-reference

Answer 9

Call by reference passes the pointer to object. Not the object itself. This is much faster than copping the obect. if your object is in array passing by reference send the address of the first element of the array. If you pass by value you would copy all array elements to the stack.
my one warning is when you pass by reference if you change the value of a member of the object it will change it to the rest of the world ( calling program ).

Answer 10

pass by reference is faster then pass by value
as it is easy to deal with address than with the data.

Answer 11

Pass by reference is faster than pass by value because in pass by reference you just pass a Pointer to it, execution of Pointer is more faster(direct memory access).

Answer 12

A reference is a pointer in disguise. A normal pointer has eight bytes. So when it's a small value like an int, cbv should be faster.
........
This will help you in C++..
😊😊

Answer 13

Pass by reference is more efficient than pass by value, because of less storage and only pass reference that make it faster,

Answer 14

pass by reference is faster then pass by value because pass by reference cannot copy the actual parameters into formal parameters which helps to decrease execution time

Answer 15

Pass by reference or pointer is usually faster and more efficient as it deals with address. Pass by value cannot be used if you need to modify the original variable.

Answer 16

first , if u pass ur parameters by value, whatever happens to the parameters inside the function, it stays inside the function and the value of that particular Parameter won't change in the main, second u can. have just one return value from a function by default hence in case u need more than one return parameter, u can define that parameter in the main and pass it by reference to the function then what ever u assign to it will be returned to main .... thus I don't say it's just about being more effective or faster ,, u have to consider the scopes ... but using reference is a faster option but u are actually using the copy of the parameter and It's value will be changed to whatever it will be inside the function

Answer 17

As Rstar has pointed out, there are already similar inquiries:
https://www.sololearn.com/discuss/1072418/
https://www.sololearn.com/discuss/1525982/
https://www.sololearn.com/discuss/221292/
Please search prior to posting.
(keywords: "call" "value")
Happy coding!

Answer 18

Depends on the scenario 😉 - objects can only be passed by reference unlike values ...

Answer 19

In C++, there are three types to pass values are that
1. Call by value :-
It will create copies of that variable and pass in function.
So, original values are not passed.
2. Call by reference :-
When we call by reference, by using & then alias of variable is created that is point to that original values. Then changes in alias are affected in original values.
3. Call by address :-
In which, address of that variable is pass as an argument using pointer *.