Wordpress plugin to graph web page speeds

I want a wordpress plugin to graph web pages speed. I want a few things recorded: 1. simple start_time in wp-config 2. end_time in a shutdown hook. 3. browser agent, or a guess of mobile/desktop, incase we want 2 graphs 4. a random ID, I dont think web surfers have sessions, to either a php session, or some random id 5. I want to record the whole render time (all web assets loaded), so we'll need ajax or something, and do a http post (or perhaps get). ajax call to something like [login to view URL] , and record end time and id. If the phpsession can be used, then that's fine. 6. And then plot them using Google Charts or something. I probably want a few graphs: - last 24 hours, showing server response (diff between vals 1 & 2), and web page load time (diff between vals 1 and 5), and obviously the hour of the day, - last 7 days - last 30 days - set of mobile graphs - top 10 slow urls (and the user agents that caused it), in last 24 hours 7. cron job - to tally/average everything to 15 min interval - delete all data old than 30 days - I dont care if this is run when you actually log into wp-admin to see the graphs 8. a semi secure way to display everything using a secret id in an iframe, without having to login. you get the secret it, and URL, when you view from wp-admin page. 9. some way I can advertise on the plugin, a link to me site and logo, and tagline, [login to view URL] 10. put the last 24 hours graph into wordpress admin dashboard, with advertising.