performance - NPOI's RemoveRow is very slow -


i'm using npoi clear data of rows given row index way last row using following function:

public void deletetolastrow(isheet sheet, int firstrowindex) {     int lastrowindex = sheet.lastrownum;     (int rowindex = lastrowindex; rowindex >= firstrowindex; rowindex--)     {         var deletedrow = sheet.getrow(rowindex);         // rows warrantied not null         sheet.removerow(deletedrow);     } }

however, have around 100 cells in each row, , around 80 cells out of 100 have complex formula. because of that, takes me 8 seconds delete 200 rows. there way increase performance in case?

most cells reference 3 or 4 other cells @ start of same row. reference 1 fixed cell @ start of sheet not delete.

i'm using .net 4.6.2, npoi 2.3.0, file xlsx i'm using xssf.


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