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"In current implementations as of August 2012, no popular user agent pre-fetches resources that are subject to media queries until those media queries are satisfied. However, it seems like a more intelligent approach could be taken based on the liklihood that the media query may be satisfied at some point after a page has loaded. "

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.

"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 !"

"Tim Kaldec et Yoav Weiss se sont donc inspirés de ce mécanisme [Content Security Policy], pour le transposer au sujet de la performance web, en proposant un nouvel en-tête HTTP (Content Performance Policy) permettant de déclarer précisément le degré de compatibilité d'une page avec certaines bonnes pratiques de performance web. À la charge ensuite du navigateur web, de forcer l'application des bonnes pratiques annoncées qui ne seraient pas respectées par l'éditeur."

"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."

Yet another speedy protocol

Alternative à Ghostwriter ou ControlJS : permet de reporter le document.write de certains scripts à plus tard dans le flux de chargement de la page, afin de ne pas retarder le Load. L'intérêt de la solution est qu'elle ne perturbe quasiment pas le script original, ce qui en facilite grandement la maintenance.

I've started experimenting with my home page to make it load even faster. Amazon famously does this too which you can read more about in this Steve Souders post. They make sure everything that needs to be visible above the fold is loaded first, then, it starts loading all the other "stuff" below the fold.

Assez d'accord avec les commentaires , il faut éviter que le crawler passe sur la ressource dédiée au chargement des huits autres articles, sinon il y a un risque de duplicate content. Pour éviter cela il faut gérer des règles pour robots.txt, est-ce suffisant ? Le découpage je le fais plutôt au niveau du styling CSS et JS. J'inclue le style css indispensable à l'affichage et charge le reste . Bref il y aussi le risque de reflow dans ce cas.

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SPDY is a replacement for HTTP, designed to speed up transfers of web pages by eliminating much of the overhead associated with HTTP. SPDY supports several optimizations that give it an edge over HTTP when it comes to speed.

Zebulon Young and I, web producers at O'Reilly Media, recently spent time focusing on the performance of the Velocity website. We were surprised by the results we achieved with a relatively small amount of effort. In two days we dropped Velocity's page weight by 49% and reduced the total average U.S.

We've come quite a long way since introducing RUM about a year ago. Being the first app performance company to build real user monitoring as a core, native feature of application performance management, we are currently monitoring about 750 million page views a day, 5 billion a week and 20 billion a month for 20,000 active accounts.