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Which is faster 5 + 5 + 5 + 5 + 5 or 5 * 5?

I don’t know how to ask, but just want to ask. Help me tag it, please. Anyway, my friend asked me a question which one is faster in Java

int a = 5 + 5 + 5 + 5 + 5

or

int b = 5 * 5 ?

Is he language dependent? I mean, afaster than bin java but not in C

my answer is afaster than bcomparing addition / multiplication in a computer organization

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8 answers

It depends on the platform (and the compiler). If you need to know, then measure it. It is unlikely that you will find yourself in a situation where you need to know.

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. :

public class Toto {
    public static void main(String[] args) {
        int a = 5 + 5 + 5 + 5 + 5;
        int b = 5 * 5;
    }
}

:

public class Toto
{
    public static void main(String args[])
    {
        byte byte0 = 25;
        byte byte1 = 25;
    }
}

.

+13

,

int a = 25;
int b = 25;

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+4

. f1(n) = n * c, f2(n) = Sum[1->n] c.

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+1

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0

I assume that Addition is faster than multiplication, because (as far as I know) all multiplications are considered as additions

Added:

read here for some explanation

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Source: https://habr.com/ru/post/1786892/

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