I try to get the list of images in Amazon EC2 inside the Google datastore. I want to realize this with a cron job inside the GAE.

class AmazonEC2uswest(db.Model):
    ami = db.StringProperty(required=True)
    mani = db.StringProperty()
    typ = db.StringProperty()
    arch = db.StringProperty()
    state = db.StringProperty()
    owner = db.StringProperty()

class CronAMIsAmazonUS_WEST(webapp.RequestHandler):
    def get(self):
      aws_access_key_id_admin = "<secret>"
      aws_secret_access_key_admin = "<secret>"

      conn_us_west = boto.ec2.connect_to_region('us-west-1', aws_access_key_id=aws_access_key_id_admin,
      aws_secret_access_key=aws_secret_access_key_admin, is_secure = False)

      liste_images_us_west = conn_us_west.get_all_images()

      laenge_liste_images_us_west = len(liste_images_us_west)

      for i in range(laenge_liste_images_us_west):
              datastore_uswest_AMIs = AmazonEC2uswest(ami=liste_images_us_west[i].id,
                                                      mani=str(liste_images_us_west[i].location),
                                                      typ=liste_images_us_west[i].type,
                                                      arch=liste_images_us_west[i].architecture,
                                                      state=liste_images_us_west[i].state,
                                                      owner=liste_images_us_west[i].ownerId)
              datastore_uswest_AMIs.put()

The problem: Getting the list with get_all_images() lasts only a few seconds. But writing the data to the Google datastore needs way too much CPU time.

My IBM T42p (P4M with 2GHz) needs for that piece of code approx. 1 Minute!

Is it possible to optimize my code in a way that it needs fewer CPU time?