Optimering af script

Iforbindelse med en webshop har jeg et script der eksportere data til diverse prissøgninger på nettet, men problemet er at det indtil nu har virket fint.
Men efter at have tilføjet flere produkter så den nu skal hente +6000 produkter ligger den serveren ned eller får timeout.
Timeout kan ikke sætte længere op..
Er det muligt at optimere scriptet...

Her er scriptet
<?php

include(dirname(__FILE__).'/config/config.inc.php');
require_once(dirname(__FILE__).'/init.php');
$max_execution_time = 60 ;



$confPasswd = '';

$tags = array(
  'name' => 'produktnavn',
  'ean13' => 'ean13', 
  'ISBN' => 'ISBN',
  'url' => 'link',
'lager' => 'LagerNiveau',
  'imageUrl' => 'billedeUrl',
  'price_inc' => 'pris',
  'description_short' => 'produktbeskrivelse',
// 'description' => 'langbeskrivelse',
  'id_product' => 'databaseid',
  'reference' => 'interntvarenummer',
  'categoryName' => 'category',
  'subCategoryName' => 'subCategory',
  'shipping_cost' => 'fragt',
  'leveringstid' => 'leveringstid',
  'manufacturerName' => 'producent',
  'supplier_reference' => 'produktID ',
'lagerstatus' => 'PaaLager ',



);


function my_strip_tags($t)
{
  $t = preg_replace('/</',' <',$t);
  $t = preg_replace('/>/','> ',$t);
  $t = preg_replace('/[\n\r\t]/',' ',$t);
  $t = preg_replace('/  /',' ',$t);
  return strip_tags($t);
}

function my_number_format($t)
{
  return number_format($t, 2, ',', '.');
}

function print_field($k, $v)
{
  global $tags;
  if (isset($tags[$k])) {
    $k = $tags[$k];
    $v = htmlspecialchars($v, ENT_NOQUOTES, "UTF-8");
    print "    <$k>$v</$k>\n";
  }
}


header("Content-Type:text/xml; charset=utf-8");
print '<?xml version="1.0" encoding="UTF-8"?>'."\n";
print "<products>\n";
$configuration = Configuration::getMultiple(array(
  'PS_LANG_DEFAULT',
  'PS_SHIPPING_FREE_PRICE',
  'PS_SHIPPING_HANDLING',
  'PS_SHIPPING_METHOD',
  'PS_SHIPPING_FREE_WEIGHT',
  'PS_CARRIER_DEFAULT'));
$id_lang = intval($configuration['PS_LANG_DEFAULT']);
$id_zone = intval($defaultCountry->id_zone);
$link = new Link();
$id_carrier = $configuration['PS_CARRIER_DEFAULT'];
$carrier = new Carrier(intval($id_carrier));
$carrierTax = 0;
if ($carrier->id_tax) {
  $tax = new Tax(intval($carrier->id_tax));
  if (Validate::isLoadedObject($tax) AND Tax::zoneHasTax(intval($tax->id), intval($id_zone)) AND !Tax::excludeTaxeOption())
    $carrierTax = $tax->rate;
}
$passwd = Tools::getValue('passwd');
$categories = Category::getCategories($id_lang, true, false);
$manufacturers = Manufacturer::getManufacturers(false, $id_lang);
if ($passwd == $confPasswd) {
  $products = Product::getProducts($id_lang, 0, 0, 'price', 'ASC', false, true);
}
else {
  $products = array();
}
$manMap =array();
foreach ($manufacturers as $manufacturer) {
  $manMap[$manufacturer['id_manufacturer']] = $manufacturer;
}
$catMap =array();
foreach ($categories as $category) {
  $catMap[$category['id_category']] = $category;
}
foreach ($products as $product) {
  $prodObj = new Product($product['id_product'], false, $id_lang);
  $product['url'] = $link->getProductLink($prodObj);
  $cover = Product::getCover($product['id_product']);
  $product['imageUrl'] = _PS_BASE_URL_.$link->getImageLink($prodObj->link_rewrite, $product['id_product'].'-'.$cover['id_image'], 'large');
  if (intval($configuration['PS_SHIPPING_METHOD']))
    $shipping_cost = $carrier->getDeliveryPriceByWeight($product['weight'], $id_zone);
  else
    $shipping_cost = $carrier->getDeliveryPriceByPrice($product['price'], $id_zone);
  $shipping_cost *= 1 + ($carrierTax / 100);
  $shipping_cost += floatval($configuration['PS_SHIPPING_HANDLING']);
  $product['shipping_cost'] = $shipping_cost;
  $product['price_exc'] = my_number_format($prodObj->getPrice(false));
  $product['price_inc'] = my_number_format($prodObj->getPrice(true));
//  $price = $product['price'] * (1 + $product ['tax_rate'] / 100  );
//  $product['price_inc'] = number_format($price, 2, ',', '.');
  $product['manufacturerName'] = $manMap[$product['id_manufacturer']]['name'];
  $product['description_short'] = my_strip_tags($product['description_short']);
  if ($product ['quantity']==0)
  $product['lagerstatus'] = 'Nej';
  else
  $product['lagerstatus'] = 'Ja';
  $product['lager'] = $product['quantity'];
  if ($product ['quantity']==0)
  $product['leveringstid'] = ($product['available_later']);
  else
  $product['leveringstid'] = '1 - 3 dage';




  //print "  <product>\n";
  $product_num++;
  echo '<product place="'.$product_num.'">'."\n";
  foreach ($product as $k => $v) {
    print_field($k, $v);
  }
  $catList = Product::getIndexedCategories($product['id_product']);
  foreach ($catList as $cat) {
    $catNames = array();
    $catId = $cat['id_category'];
    while ($catId && $catId != 1) {
      array_unshift($catNames, trim($catMap[$catId]['name']));
      $catId = $catMap[$catId]['id_parent'];
    }
    print_field('categoryName', implode(' | ', $catNames));
  }
  print "  </product>\n";
}
print "</products>\n";

?>