Topic: Performance Page 5

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 opinion. But over the last… More

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 the audio either would not… More

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 very, very hard. In a… More

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 head and footer, adds hooks… More

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 out for me: CSS2 support… More

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 and for mobile websites /… More

Hey there. It’s been a year since we first opened our mobile browser concurrency test for people to use, so I thought I’d take a quick moment to thank everyone who has taken the test.  All 6,461 of you. … More

To improve your WordPress performance we have previously advocated using the WP Super Cache plugin to enable pages served from a static cache.  This works quite well unless you are doing some form of content adaptation that is specific… More

In a previous post I presented the performance numbers for mobile device detection using WURFL and Device Atlas. Our numbers were generated on a data set consisting of 1,572 unique user agents we collected as part of our… More

This has probably been done to death elsewhere, but since I’ve been playing around with WURFL and Device Atlas for mobile device detection, I thought I’d publish some comparative performance numbers. As part of our mobile browser… More