How do I make this Google Script faster？ - google-apps-script

Question

function Backup() {
var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
spreadsheet.setActiveSheet(spreadsheet.getSheetByName('A'), true);
spreadsheet.getRange('A13:H').activate();
///Copy source to target and clear it
var target = SpreadsheetApp.openById("XXX");
var source_sheet = spreadsheet.getSheetByName("A");
var target_sheet = target.getSheetByName("B");
var source_range = source_sheet.getActiveRange();
var last_row = target_sheet.getLastRow();
var values = source_range.getValues();
target_sheet.getRange(last_row + 1, 1,values.length,values[0].length).setValues(values);
source_range.clearContent();
///How do I make this Google Script faster？

Answer 1

I believe your goal is as follows.
You want to reduce the process cost of your script.
In this case, how about the following patterns?
Pattern 1:
In this pattern, the Spreadsheet service (SpreadsheetApp) is used.
function sample1() {
var srcSpreadsheet = SpreadsheetApp.getActiveSpreadsheet();
var srcSheet = srcSpreadsheet.getSheetByName("A");
var srcRange = srcSheet.getRange('A13:H' + srcSheet.getLastRow())
var srcValues = srcRange.getValues();
var dstSpreadsheet = SpreadsheetApp.openById("XXX"); // Please set the destination Spreadsheet ID here.
var dstSheet = dstSpreadsheet.getSheetByName("B");
dstSheet.getRange(dstSheet.getLastRow() + 1, 1, srcValues.length, srcValues[0].length).setValues(srcValues);
srcRange.clearContent();
}
Pattern 2:
In this pattern, Sheets API is used. Before you use this script, please enable Sheets API at Advanced Google services.
function sample2() {
var srcSpreadsheet = SpreadsheetApp.getActiveSpreadsheet();
var srcSheet = srcSpreadsheet.getSheetByName("A");
var srcRange = "'A'!A13:H" + srcSheet.getLastRow();
var values = Sheets.Spreadsheets.Values.get(srcSpreadsheet.getId(), srcRange).values;
var dstSpreadsheetId = "XXX"; // Please set the destination Spreadsheet ID here.
Sheets.Spreadsheets.Values.append({ values }, dstSpreadsheetId, "B", { valueInputOption: "USER_ENTERED" });
srcSpreadsheet.getRange(srcRange).clearContent();
}
References:
Method: spreadsheets.values.get
Method: spreadsheets.values.append

Answer 2

To speed up, don't use activate() in your script. Try
// source
var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
var source_sheet = spreadsheet.getSheetByName("A");
var source_range = source_sheet.getRange('A13:H');
var values = source_range.getValues();
// target
var target = SpreadsheetApp.openById("XXX");
var target_sheet = target.getSheetByName("B");
var last_row = target_sheet.getLastRow();
// copy
target_sheet.getRange(last_row + 1, 1, values.length, values[0].length).setValues(values);
source_range.clearContent();