How to add batch processing in google apps script – Javascript

I am new to google apps script. I have 3 sheets data (source), sheet(target), and master_rate. in the datasheet, there are around 4k rows of data. what I am doing is summarising the data sheet and displaying it in sheet 4. but the problem is there is so much data and I can’t copy all the data at once. i am only able to copy around 1k data at once, is there any way to get all the data at once using batch processing?

this is my code.

function testfn(){
  var activeSheet = SpreadsheetApp.getActiveSpreadsheet();
  var sourceSheet = activeSheet.getSheetByName('data');
  var lastRow = sourceSheet.getLastRow();

 // Select the source spreadsheet cells.
  var sourceColumnRange = sourceSheet.getRange('A2:BZ');
  var sourceColumnValues = sourceColumnRange.getValues();

  // Get target spreadsheet by its name..
  var targetSheet = activeSheet.getSheetByName('Sheet4');

  var column= sourceColumnValues[1];
  var col1 = [8,14,29,49]; //one of these 4 column have a amount
  var col2 = [77,13,28,47]; //one of these 4 column have a currency type (¥円, $ドル, €ユーロ) 
  var col4 = [0];
  var col5 = [5];
  var col6 = [66];
  var col7 = [9,15,30,50]; //one of these 4 column have a date value
  var col8 = [45,65]; //one of these 2 column have a value of origin
  var col9 = [51,59,61,62]; //one of these 4 column have a memo

  for(var i=0; i<lastRow-1; i++){
    var colA = '';
    var colB = '';
    var colC = '';
    var colD = '';
    var colE = '';
    var colF = '';
    var colG = '';
    var colH = '';
    var colI = '';
    var colJ = '';

    var date = '';
    var yearMonth = '';
      
      for(var j=0; j<=column.length; j++){
        //for transaction Amount
        if(col1.includes(j)) {
          if(sourceColumnValues[0,i][j]) {
            colA = sourceColumnValues[0,i][j];
          }

        }
        // for transaction  currency
        // to do get transaction rae from master_rate sheet and multiply
        if(col2.includes(j)) {
          if(sourceColumnValues[0,i][j]) {
            colB = sourceColumnValues[0,i][j];
            if(colB.trim() === '¥円'){
              colC = colA;  //if currency is ¥円 same as colA
            }
            else if(colB === '$ドル'){
              Logger.log(colA);
              colC =  colA * 120; //if currency is $ドル multiply colA by 120
              // Logger.log(eval(colA));
            }
            else if(colB === '€ユーロ'){
              colC = colA * 140; //if currency is €ユーロ multiply colA by 140
            }
            else{
              colC = 'error';

            }
          }
        }

        // for customer code
        if(col4.includes(j)) { 
          if(!colD) {
            var str = sourceColumnValues[0,i][j];
            var codeArr = str.split('_');

            var data = codeArr[codeArr.length - 1];
            var res = data.replace(/[^0-9]/g, "");
            colD = '10'+res;

          }
        }

        //for Z number
        if(col5.includes(j)) {
          if(!colE) {
            colE = sourceColumnValues[0,i][j];
            colG = '売上 ' + colE;
          }
        }
        //if colF has one of these value 株式会社クレヴィオ_g04, 有限会社ユニゲリカー_g03, 有限会社ユニゲ_g02 set value if null set '有限会社ユニゲ_g02'
        if(col6.includes(j)) {
          if(!colF) {
            colF = sourceColumnValues[0,i][j];
            if(colF == ''){
              colF = "有限会社ユニゲ_g02";

            }
          }
        }

        //for date 
        if(col7.includes(j)) {
          if(sourceColumnValues[0,i][j]) {
            colH = sourceColumnValues[0,i][j];
            var date = Utilities.formatDate(colH, "GMT", 'yyyy/MM/dd');
            var ym = Utilities.formatDate(colH, "GMT", 'MMMM, yyyy');
             var yearMonth = new Date(ym).toDateString();
          }
        }

        // for origin value
        if(col8.includes(j)) {
          if(!colI) {
            colI = sourceColumnValues[0,i][j];
            if(colI == ' '){
              colI = "国内";
            }
          }
        }

        // for memo
        if(col9.includes(j)) {
          if(!colJ) {
            colJ = sourceColumnValues[0,i][j];
          }
        }

        // Create a date object for the current date and time.
        var now = new Date();

      }
      //set value in Sheet4
      targetSheet.getRange(i+2, 1).setValue(colA);
      targetSheet.getRange(i+2, 2).setValue(colB);
      targetSheet.getRange(i+2, 3).setValue(colC);
      targetSheet.getRange(i+2, 4).setValue(colD);
      targetSheet.getRange(i+2, 5).setValue(colE);
      targetSheet.getRange(i+2, 6).setValue(colF);
      targetSheet.getRange(i+2, 7).setValue(colG);
      targetSheet.getRange(i+2, 8).setValue(date);
      targetSheet.getRange(i+2, 9).setValue(yearMonth);
      targetSheet.getRange(i+2, 10).setValue(colI);
      targetSheet.getRange(i+2, 11).setValue(colJ);
      targetSheet.getRange(i+2, 12).setValue(now);
         
  }
}