Question

class ImageHandler(webapp2.RequestHandler):
    def get(self):
        a_user = db.get(self.request.get('img_id'))
        if a_user.profile_img:
            self.response.headers['Content-Type'] = 'image/png'
            self.response.out.write(a_user.profile_img)
        else:
            self.response.out.write("No image")

This is quite slow when loading a image. Every time when I reload a page I see the images reloading starting from top of the image and gradually load the whole image (Please let me know if you don’t understand what I mean). Should I cache the img_id? but it seems to me that when you use a handler to load an image, it doesn’t help for the application to load faster image. Any ideas on how to load image faster? Thanks in advance.

Answer 1

Are you still in development? Things will be much slower in the development server, as that only processes one request at a time. The production performance will be much better.

That said, you might be better off using GAE’s built-in image hosting. For that, rather than storing the image data in a blobproperty within your model, you upload it directly to the blobstore and reference it with a BlobReferenceProperty. Once that’s done, you can use Image.get_serving_url() to get GAE to serve it directly, so it doesn’t have to go through your app at all.