VBA 获取Sheet最大行

compared all possibilities with a long test sheet:

0,140625 sec for

lastrow = calcws.Cells.Find("*", [A1], , , xlByColumns, xlPrevious).row

0 sec for

iLastRow = calcws.Cells(rows.count, "a").End(xlUp).row

and

numofrows = calcws.Cells.SpecialCells(xlLastCell).row

0,0078125 sec for

lastrow = calcws.UsedRange.rows.count
Do While 1
    If calcws.Cells(lastrow, 1).Value = "" Then
        lastrow = lastrow - 1
    Else
        Exit Do
    End If
Loop

I think the favourites are obvious...