navigation-timing-api

I listened to a talk by Steve Souders a few days ago and he mentioned the new performance spec that newer browsers are implementing and it was pretty intriguing. In his speech he mentioned the following example as a means of measuring perceived page load time: var timing = performance.timing; var loadtime = timing.loadEventEnd - timing.navigationStart; alert("Perceived time:"+loadtime); Clearly this is a basic example, but when trying it on my development environment, I get crazy numbers like -1238981729837 as the answer because loadEventEnd is < 0. Obviously something is amiss and there are

I think the question is straight forward. I'm looking for something that's similar to window.performance.now() in nodejs V8 engine. Right now I'm just using:- var now = Date.now(); //do some processing.. console.log("time elapsed:", Date.now() - now); But, I read that window.performance.now() is lot more accurate than using the date because of the what's defined here . barry-johnson I would only mention that three of the reasons the author gives for the preference of the timing API in the browser wouldn't seem to apply directly to a node situation, and the fourth, the inaccuracy of Javscript

We've got a single page app built with Knockout and Backbone which makes Ajax calls to the server and does some complex data caching and DOM rendering. We're really like to measure the performance (and log it back to the server) as seen by the user. I can't seem to get my head wrapped around whether the browser Navigation Timing API is going to be useful for this or not. From what I see in examples, the Navigation Timing API is tied to window.performance and this is limited to the page load and not suitable for monitoring Ajax behavior. True or false? If false, what else can I use? I'd love to