[julia-users] duplicating the value of a variable

['Stéphane Laurent' via julia-users]

Hi,

 In a program I have some *n*1* arrays, say 

*A*
*B*
*C*
*D*


and in order to make a certain calculation, for convenience, I construct 
the array

*A B*
*B C*
*C D*
*D A*


There will be millions of such arrays generated by my final program, with 
*n* greater than 4 and the components A, B, C, D, ... are *BigFloat*.

Then I'm wondering how to optimize my copy from the first array to the 
second array. Is there something to gain performance when we duplicate some 
variables ?