Google App Engine Application Code Optimization

Question

The google app engine tells me to optimize this code. Anyone have any ideas what I can do?

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

And later in the template, I:

{% 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 }}

Where the following methods are used:

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

Answer 1

High CPU usage will be associated with receiving 100 objects per request. Here you have several options:

• Using Profile.all (). fetch (100) will always be a little faster and easier to read.
• Remove any extraneous properties from the profile model. There are significant deserialization essential service objects based on properties.
• Show fewer users per page.
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Answer 2

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Answer 3

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Answer 4

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I found that many Django templates do not take up many CPU applications (50-100 Mcycle). If all fields for the template are precomputed.