Help to improve code efficiency

Hi All,

I wrote a code to compile 2 set of data together. The data is about 15,000 lines and so my code run very slowly. Hope you guys can help to improve the efficiency. Many Thanks in advance

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Hi,

Thanks. It is very slow.
and it get stuck at this particular code.

".Range("Y2:Y" & PO_lastrow).Formula = "=VLOOKUP($B2,SOA!$P:$Q,2,FALSE)"

anyone have any idea how i can solve?
thanks in advance