How to refactor comparison loops in my excel vba code for speed? -

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i new excel vba , not have experience. have 2 worksheets of data compare , if value matches copy , paste second worksheet. use loops compare every row , wondering if there better way this? using brute force , hoping there way program not run long. (i repeat block of code on different sheets 13 times). code consolidating information if meets conditions. below code. 

   sub consolidate(z)       sheets(z).range("b1:axh100").delete '''deletes former values'''       = 1 30       x = 1 500       if isempty(sheets("sheet1").cells(x, 13)) 'if cell value empty skip it'           = 1       else:           if sheets("sheet1").cells(x, 18) = sheets(z).cells(1, 1) 'check see if value same'           if sheets("sheet1").cells(x, 13) = sheets(z).cells(i, 1) 'check see if value same'               sheets("sheet1").cells(x, 15).copy 'copy value'               sheets(z).select 'select second sheet'               cells(i, 1).select               activesheet.cells(activecell.row, columns.count).end(xltoleft).offset(0, 1).select 'offsets cell   left'               selection.pastespecial past:=xlpastevalues 'pastes'       end sub

as answered here, if need access or change several cells, you're better off reading cells array, working directly array(s) , sending results excel once you're done. it's quite bit more work, , excel's array-handling not best, speed-wise there's no comparison.

this article explains process in more detail.


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