Code runs too slow

Question

I\'m trying to run a code that copies values from one spreadsheet and copies them to another, however the order is not the same(hard to make it an array). In some cases it also

Answer 1

The code should be optimised:

1. You do all calculations in a loop
2. You use getValue and setValue instead of faster functions getValues, setValues

Instead of this concentrate your loop to do a single call:

var rowInt = destinationSheet.getRange(destinationSheet.getLastRow()+1, 4,1,1).getRow()

try to figure out how to find the first row outside the loop and then increment this value:

var rowStart = destinationSheet.getRange(destinationSheet.getLastRow()+1, 4,1,1).getRow();

for (var row = rowStart; row <= lastRow, row++)
{
  // some code...
}

Use arrays and then copy the value from arrays into ranges:

var formulas = [];

for (var row = rowStart; row <= lastRow, row++)
{
  // some code...
  formulas.push(['=Month(D'+ row + ')']);
}
var rangeToPateFormulas = destinationSheet.getRange('A' + rowStart + ':A' + lastRow);
rangeToPateFormulas.setFormulas(formulas);

And so on. See more info:

https://developers.google.com/apps-script/reference/spreadsheet/range

https://developers.google.com/apps-script/guides/support/best-practices