I've done some work refactoring the homepage of DoneCal so that it does no logic other than just serving HTML. What it used to do was some basic security checks and stuff so that it says "Hi Peter" and a log out link. Now all of that has been moved to one simple piece of AJAX call.
ab -n 1000 -c 10 http://donecal.com/ ... Requests per second: 353.65 [#/sec] (mean)
ab -n 1000 -c 10 http://donecal.com/ ... Requests per second: 9796.78 [#/sec] (mean) ab -n 1000 -c 10 http://donecal.com/auth/logged_in.json ... Requests per second: 3756.25 [#/sec] (mean)
The reason why loading the index.html can be so fast is because I'm using Nginx directly. In my Nginx config I have to not use the static file if the request isn't a GET request or if it has a query string. I'll need to remove that stuff too and then it means that I can push the index.html file out to my AWS CloudFront CDN using a CNAME.