Optimization of Google App Engine Code

def index(request):
    user = users.get_current_user()
    return base.views.render('XXX.html',
                 dict(profiles=Profile.gql("").fetch(limit=100), user=user))

{% for profile in profiles %}
  <a href="/profile/{{profile.user.email}}/"><img src="{{profile.gravatarUrl}}"></a>
  <a href="/profile/{{profile.user.email}}/">{{ profile.user.nickname }}</a>
  <br/>{{ profile.shortDisplay }}

def shortDisplay(self):
    return "%s/day; %s/week; %s days" % (self.maxPerDay, self.maxPerWeek, self.days)

def gravatarUrl(self):
    email = self.user.email().lower()
    default = "..."
    gravatar_url = "http://www.gravatar.com/avatar.php?"
    gravatar_url += urllib.urlencode({'gravatar_id':hashlib.md5(email).hexdigest(),
        'default':default, 'size':"64"})
    return gravatar_url