안녕하세요?
Datagridview를 통해서 100만개정도의 데이터를 출력시키는 프로그램을 작성하였습니다.
프로그램 사용하는데 있어서 큰 지장은 없지만 약간의 버벅임이 존재하여 확인해본 결과 스크롤시에 GC를 매우 여러번 호출하는 현상을 발견하였습니다.
Virtual Mode를 사용하여 Cellvalueneeded 이벤트를 통해 기존에 존재하는 배열의 인덱스를 참조하여 gridview의 셀에다가 데이터를 넣기만 하는데 GC를 왜이렇게 많이 호출하는지 궁금합니다.
(제 생각에는 매모리 할당 해제가 일어나지 않을것같거든요,.,)

제가 작성한 코드는 아래와 같습니다.
여러번 확인했는데 문제될것은 없어 보이는데.. 혹시 조금 더 효율적인 방법이 있나요?

private void Form1_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e)
        {
            if (e.RowIndex >= ListCF.Count)
            {
                return;
            }

            DataGridView dgv = (DataGridView)sender;

            if (dgv.SelectedCells.Count == 1)
            {
                if (e.RowIndex == dgv.SelectedCells[0].RowIndex && e.ColumnIndex == 0)
                {
                    dgv.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.LightSkyBlue;
                }
                else if (e.ColumnIndex == 0)
                {
                    dgv.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.White;
                }
            }
            else
            {
                dgv.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.White;
            }

            if (dgv.Name == DGV[(int)DGV_DEVICE.CF190].Name)
            {

                switch (e.ColumnIndex)
                {
                    case (int)DGV_HEADER_CF190.NO:
                        e.Value = e.RowIndex + 1;
                        break;
                    case (int)DGV_HEADER_CF190.NAME:
                        if (ListCF[e.RowIndex].rawData_64 == 0xF000000000000000 || ListCF[e.RowIndex].rawData_64 == 0)
                        {
                            e.Value = "-";
                        }
                        else if (DeviceDataInfo[(int)DGV_DEVICE.CF190].ContainsKey(ListCF[e.RowIndex].instructionInt))
                        {
                            e.Value = (DeviceDataInfo[(int)DGV_DEVICE.CF190][ListCF[e.RowIndex].instructionInt].InstName);
                        }
                        else
                        {
                            e.Value = "Instruction ERR";
                        }
                        break;
                    case (int)DGV_HEADER_CF190.INSTRUCTION_s:
                        e.Value = ListCF[e.RowIndex].siSnsrInst65;
                        break;
                    case (int)DGV_HEADER_CF190.BIT13__9:
                        e.Value = ListCF[e.RowIndex].siSnsrBit13__9;
                        break;
                    case (int)DGV_HEADER_CF190.PARITY_s:
                        e.Value = ListCF[e.RowIndex].siSnsrParity;
                        break;
                    case (int)DGV_HEADER_CF190.BIT7__4:
                        e.Value = ListCF[e.RowIndex].siSnsrBit7__4;
                        break;
                    case (int)DGV_HEADER_CF190.DATA_IN_s:
                        e.Value = ListCF[e.RowIndex].siSnsrData;
                        break;
                    case (int)DGV_HEADER_CF190.TFF_s:
                        e.Value = ListCF[e.RowIndex].soSnsrTFF;
                        break;
                    case (int)DGV_HEADER_CF190.TST_s:
                        e.Value = ListCF[e.RowIndex].soSnsrTST;
                        break;
                    case (int)DGV_HEADER_CF190.EOP_s:
                        e.Value = ListCF[e.RowIndex].soSnsrEOP;
                        break;
                    case (int)DGV_HEADER_CF190.SID:
                        e.Value = ListCF[e.RowIndex].soSnsrSID;
                        break;
                    case (int)DGV_HEADER_CF190.DATA_Out_s:
                        e.Value = ListCF[e.RowIndex].soSnsrOutputData;
                        break;
                    case (int)DGV_HEADER_CF190.INSTRUCTION_m:
                        e.Value = ListCF[e.RowIndex].siMdulInstruction;
                        break;
                    case (int)DGV_HEADER_CF190.PARITY_m:
                        e.Value = ListCF[e.RowIndex].siMdulParity;
                        break;
                    case (int)DGV_HEADER_CF190.DATA_IN_m:
                        e.Value = ListCF[e.RowIndex].siMdulInputData;
                        break;
                    case (int)DGV_HEADER_CF190.TFF_m:
                        e.Value = ListCF[e.RowIndex].soMdulTFF;
                        break;
                    case (int)DGV_HEADER_CF190.TST_m:
                        e.Value = ListCF[e.RowIndex].soMdulTST;
                        break;
                    case (int)DGV_HEADER_CF190.EOP_m:
                        e.Value = ListCF[e.RowIndex].soMdulEOP;
                        break;
                    case (int)DGV_HEADER_CF190.BIT12__11:
                        e.Value = ListCF[e.RowIndex].soMdulBit12__11;
                        break;
                    case (int)DGV_HEADER_CF190.WDF:
                        e.Value = ListCF[e.RowIndex].soMdulWDF;
                        break;
                    case (int)DGV_HEADER_CF190.BIT9__8:
                        e.Value = ListCF[e.RowIndex].soMdulBit9__8;
                        break;
                    case (int)DGV_HEADER_CF190.DATA_OUT_m:
                        e.Value = ListCF[e.RowIndex].soMdulData;
                        break;

                }
            }
        }

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