Web Performance

Summary: We further explore the results of upgrading to a faster server. Overall the site showed improved response speed and website "stickiness." Average page load times improved by 48% to 60% server response times improved by more than 60%, and people stayed longer, viewed more pages, and bounced less.

"A bookmarklet to create a front-end performance heatmap of resources loaded in the browser using the Resource Timing API."

Video there: https://www.youtube.com/watch?v=FEs2jgZBaQA

"Calculate visual performance metrics from a video (Speed Index, Visual Complete, Incremental progress, etc). This is a command-line port of the WebPagetest mobile video processing and metrics code."

Use this file to prevent your computer from connecting to selected internet hosts. This is an easy and effective way to protect you from many types of spyware, reduces bandwidth use, blocks certain pop-up traps, prevents user tracking by way of "web bugs" embedded in spam provides partial protection to IE from certain web-based exploits and blocks most advertising you would otherwise be subjected to on the  internet.

"Asm.js is a clear step towards enabling near-native performance for the Web platform, which is why we're excited to bring it to Chakra in an upcoming release."

Etude de cas Performance Web sur le site de  Wired

content adaption without increased client latency

we can tell the browser which sockets we will need ahead of initiating the actual requests via the new preconnect hint shipping in Firefox 39 and Chrome 46

"... Quelle que soit l'issue, le budget de performance en tant qu'outil aura fait son office : vous vous serez interrogé sur les impacts de cette évolution, et vous en aurez maîtrisé les conséquences."

"Submit a URL to generate a node map of all of the requests on the page. Rapidly identify what third-parties are on your site, where your transmitted bytes are coming from and how slow your domains are !"

"If you want to improve performance, you must start by measuring performance. But what should you measure?"

"Les 3 caches ? C'est comme les 3 coquillages : on peut faire sans, mais les gens du futur se moqueront."

"Les 3 caches ? C'est comme les 3 coquillages : on peut faire sans, mais les gens du futur se moqueront."

"I want to share with you my simple two-step secret to improving the performance of any website. 1. Make sure that the most important elements of the page download and render first. 2. Stop there."