You can test this “memory leak” with the HTML code and this “sample” PHP

file: data.php

<?php

$data_points = array();

for ($i = 1; $i <= 10; $i++) {
  $timestamp = time() -($i*60)."000";
  $random = rand(20, 30);
  $point = array("x" => $timestamp, "y" => $random);
  array_push($data_points, $point);
}

echo json_encode($data_points, JSON_NUMERIC_CHECK);

?>

Where am I doing wrong?
I’m interested in buying the license if it works