Question

Hello I want to know if in the appengine env the things I did is usefull
Because I don’t know why this page is very slow.

class Foo(db.Model):
    id = db.StringProperty(multiline=True)
    name = db.StringProperty(multiline=True)
    date = db.DateTimeProperty(auto_now_add=True)
    description = db.TextProperty()    
    carac = db.StringProperty(multiline=True)



class FoosPage(webapp.RequestHandler):
  def get(self):
    foos =  memcache.get("all-foos")
    if foos is None:
        foos = Foo.all()
        size = foo.count()
    else :
        size = len(foo)

    foosTab=[]
    for i in range(size) :
        foosTab.insert(i,foos[i])
        memcache.set("all-foos", foosTab, 60)
    template_values = {
        'foos': foos
            }
    path = os.path.join(os.path.dirname(__file__) + '/../templates/', 'foos.html')
    self.response.out.write(template.render(path, template_values))

Answer 1

You have the memcache.set() inside the loop. That’s a lot of unnecessary traffic to the memcache service. Do it once, after the loop.

Further, the way you have that coded, there’s no need for establishing size.

foosTab = []
for foo in foos:
    foosTab.append(foo)

or, more idiomatically

foosTab = [foo for foo in foos]

That’ll save you doing a separate count().