B4J Question cloning array of int

[giggetto71]

Hi,
I need to find a way to "clone" an array of integers. I know from the documentation that I cannot use the B4XSerializator as it specifically does not support arrays of primitves types.
Unfortunately changing this array into a List would be nearly impossible due to the specific application. I also doubt I would be able to turn it into an array of objects as I really need int values (the array is a chess board and the elements are the pieces mapped to int values )
What could be another way to make a fast copy of an array? Execution Speed is really key in this application.
thanks

 

[agraham]

ByteConverter.ArrayCopy

 

[Erel]

What could be another way to make a fast copy of an array? Execution Speed is really key in this application.

It sounds like a "preoptimization" question.

Sub AppStart (Args() As String)
    Dim arr(1000) As Int
    For i = 0 To arr.Length - 1
        arr(i) = Rnd(0, 1000000)
    Next
    Dim n As Long = DateTime.Now
    For i = 1 To 1000
        CopyArray(arr)
    Next
    Log(DateTime.Now - n)
End Sub

Sub CopyArray(arr() As Int) As Int()
    Dim n(arr.Length) As Int
    For i = 0 To n.Length - 1
        n(i) = arr(i)
    Next
    Return n
End Sub

Copying 1000 arrays with 1000 elements takes 5 milliseconds on my PC.
Copying 1000 arrays with 64 elements takes between 0 to 1 milliseconds.

 

[agraham]

^Today at 4:40 AM^
You're up early! Isn't that 06:40 IDT? Did you have to sneak out to the forum while the wife wasn't looking, seeing you are supposed to be on vacation?

 

[LucaMs]

^Today at 4:40 AM^
You're up early! Isn't that 06:40 IDT? Did you have to sneak out to the forum while the wife wasn't looking, seeing you are supposed to be on vacation?

No, in the Maldives it was 8:40 AM

 

[Erel]

No, in the Maldives it was 8:40 AM

I'm at Tokyo, cheering for the Italian athletics.