I am running a simple application on google app engine which uses some images. Apparently it take a long time to download the images resulting in slow loading of the page.
I tried increaseing the Frontend Instance Class, but doesnt seem to improve the situation. Does GAE have this problem, or is it just my application?
The page loaded just fine for me. Although I have a couple of thoughts here.
First I would audit the page using the Chrome developer tools (Right click->Inspect Element->Audit).
The audit page show you some suggestions on how to improve the page performance. The most important are:
Leverage browser caching: See Static Cache Expiration
Serve static content from a cookieless domain: your images should be declared with a Static File Handler.
Specify image dimensions: rendering is faster when you set the width and height for images.