"Does combining the media queries have any actual performance improvements? Are people simply raising issue because they don't like the way the output CSS looks? That's a damn good question and one that Aaron also raised. As he put it, "Let's ask science!""
"A grunt task which takes a html file, finds all the css and js links, and outputs a version with all the css and js written inline for ease of pasting into a cms"
"I've worked on projects where some of the devices we needed to test on couldn't load the page at all if jQuery was present-it was just too much JavaScript for the device to handle."
"engines do serialize and strip out duplicated media-queries so they only need to evaluate each media query once. Also they cache the queries so that they can re-use it later on"
"At Artsy we've been building Node.js applications that share code and rendering between the server and browser. We've seen many benefits from this - pages load faster, we can optimize SEO, developers are more productive, and JavaScript coding is just an overall better experience."
"WebPagetest will now expose any User Timing marks that a page records so you can use the same custom events for your synthetic test measurement as well as your Real User Measurement"
"Google mobile search is getting faster - to be exact, 200-400 milliseconds faster! We are gradually rolling out this improvement to all browsers that support the attribute (currently, mobile Chrome and Safari)."
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"while 75% of the top 100 retail websites employ a Content Delivery Network (CDN), the median home page takes a full second longer to become interactive than the median page that does not use a CDN"
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