What is the fastest way to modify a byte array?

[Gilberto Gil]

I need to modify a byte array that I've read from my memory.... a need to modify it an then rewrite to my flash all it again..but i need to do it faster.. then my question is how to modify that array as faster as i can, note that the other work reading memory etc is already done?.......... .. thanks in advance

[Rabbit]

It depends on what you're trying to do to the byte array.

[Gilberto Gil]

I am just trying to interchange some bytes of my buffer for other

[Rabbit]

So you mean bytearrayvar[i] = otherbytearrayv ar[i]? That's as fast as it gets.

[bvrwoo]

What do you mean by interchanged? Are you looking to copy it or clone the copy? What?