Performance, Page 7

I recently did some research into the HTML that Facebook was using in the old version of its iOS app. More on that in a future post. In the meantime, I thought I’d share…

As long as I’m posting puzzles, riddle me this: what happens to the browser’s lookahead pre-parser if we find the holy grail of responsive images—an image format that works for all resolutions? What is…

Over the last few weeks many more web developers and designers have become engaged in the conversation surrounding responsive images. On the whole, this is great news because the more people we have telling browser…

Scott Jehl recently tweeted: I concur. A couple of months ago, I asked what you preferred as a solution for responsive images. At the time, I didn’t have a strong…

When it is AppleCoreMedia. Let me explain. I wrote recently about a quiz that we built that included HTML5 audio files. In addition to the volume problems already discussed, we encountered intermittent issues where…

WordPress 2.8 introduced some constants and bits and bots that nominally make certain kinds of compression of JavaScript and CSS possible. This post looks at JavaScript compression and explains what is possible, and what is…

Warning: Technical WordPress post ahead! Overview: Really Getting JavaScript Into the Footer Quoth the WordPress Version 2.8 feature list: – Improvements to the script loader: allows plugins to queue scripts for the front end…

There’s an interesting article on mobiforge.com that talks about the pitfalls of using CSS sprites for mobile web content. While there are several reasons why sprites may not be a good idea, two stand…

As many of you know, we’re fairly enamored with the YSlow techniques for understanding and evaluating web performance for web applications.  We have successfully used the information to improve the user-perceived performance for “traditional” websites…