MatrixAdapt | Logiciel de gestion d'Entreprise, Création et référencement des sites web

Bryan

Matthew

• The server and browser can compress HTTP headers, saving bytes on the network.
• Multiple resource requests can be multiplexed over a single TCP connection, saving connections on the network.
• The browser can request all page resources at once instead of a few at a time, which reduces the number of network round-trips needed between server and client.

(Cross-posted from the Google Webmaster Central Blog.)

• The YouTube Data API supports partial response and partial update.


• The Calendar Data API supports partial response and partial update with Java client library support.


• The Picasa Web Albums Data API supports partial response and partial update with Java client library support.


• The read-only Sidewiki Data API supports partial response with Java client library support.

• The We-AMP team has announced a beta release of IISpeed, which enables PageSpeed web content optimization within the Microsoft IIS web server. "IIS and ASP.NET are very popular technologies on the web, powering millions of websites, and we are excited to bring the full power of PageSpeed optimization to the Windows platform," said Otto van der Schaaf and Kees Spoelstra.
• Thanks to open-source contributions, mod_pagespeed is now integrated with CPanel and WHM, an easy-to-use server control and management panel for web hosts and website owners.
• Google Chrome has adapted PageSpeed to power the recently announced Chrome data compression proxy, which significantly reduces data usage and speeds up page load times on cellular networks.

• Combined and minimized JavaScript and CSS files used throughout the site

• Implemented CSS sprites for frequently-used images

• Implemented lazy loading of Google AJAX APIs loader module (google.load)
  

    <script type="text/javascript" src="http://www.google.com/jsapi"></script>

if (needToLoadGoogleAjaxApisLoaderModule) {
    // Load Google AJAX APIs loader module (google.load)
    var script = document.createElement('script');
    script.src = 'http://www.google.com/jsapi?callback=googleLoadCallback';
    script.type = 'text/javascript';
    document.getElementsByTagName('head')[0].appendChild(script);
}

function googleLoadCallback() {
  // Initialize AJAX Feed API
  google.load('feeds', '1', {callback: startUsingAjaxFeedAPI});
}

function startUsingAjaxFeedAPI() {
  // Start using AJAX Feed API
  var feed = new google.feeds.Feed(someFeedUrl);
  ...
}

• Doug Crockford: JavaScript: The Good Parts
• John Resig: Drop-in JavaScript Performance

Matthew

Libo

• Follow the instructions to install the Page Speed for Chrome extension on your desktop Chrome browser.
• Enable remote debugging in Chrome running on your Android device.
• Navigate to the remote Chrome Developer Tools page in your desktop browser (localhost:9222) .
• Select one of the Chrome tabs running on your Android device.

As part of our Make The Web Faster initiative, Google announced the availability of mod_pagespeed, an open-source module for Apache webservers to automatically accelerate the sites they serve. Go Daddy, the top web hosting provider and world's largest domain name registrar, announced that they would roll out the mod_pagespeed feature for their Linux Web hosting customers. The feature is now available and is in use by Go Daddy customers who have already started to report faster webpage load times.

“Who on the Internet wouldn't want a faster website?” asked Go Daddy CEO and Founder Bob Parsons. “The benefits of mod_pagespeed are really a slam dunk. It’s built to boost users’ web performance, and ultimately, the bottom line for their business.”

By using several filters that implement web performance best practices, mod_pagespeed rewrites web page resources to automatically optimize their content. The filters improve performance for JavaScript, HTML and CSS, as well as JPEG and PNG images.

Mike Bender, co-creator of photo-blog AwkwardFamilyPhotos.com and Go Daddy customer, detected a 48% decrease, slicing the load time for his image-rich website from 12.8 to 6.6 seconds. mod_pagespeed speeds up the first visit of the site by reducing the payload size and improving compression. Repeat visits are accelerated by making caching more efficient and decreasing the size of resources such as CSS and HTML on the page as demonstrated in this chart (where smaller is faster):

“From the moment we enabled mod_pagespeed, the difference was noticeable,” said Bender. “It was a simple ‘flick of the switch,’ and the site started loading faster.”

For Go Daddy customers currently using the Linux 4GH web hosting platform, find out how to enable mod_pagespeed for your own website here. Other webmasters can install mod_pagespeed binaries or build directly from source.