Programmer's Braindump: Quick Google App Engine RSA Benchmark: "To expand on what Strom said: The 20 minutes of frontend time is because App Engine started a frontend instance to handle the request, and then kept it alive until it became clear he wasn't going to get any more requests. As you say in the article, the actual calculation only took 10 seconds. You could hit your frontend instance once every 10 seconds for an hour for a price of $0.08 an hour as well, which would correspond to around 12 CPU-minutes on your computer, so around 2/3rds of a cent per your-PC-CPU-minute."
'via Blog this'