This a quick follow-up to a post I wrote a few months ago about embedding data URIs in stylesheets and a potential performance hazard regarding the way non data URI images are positioned in the network waterfall. What I found was that under certain circumstances the performance penalty was great enough to not only negate ...
Maybe it’s because I have weak PowerPoint computer hacking skills, but whenever I work on a presentation I find myself thinking, “Shouldn’t this be easier?” or “I’d rather be doing this with CSS.” So last week when I ran into my usual PowerPoint frustration I decided to devote a little time to correct the problem ...
Earlier today I was playing around with a performance test case when I noticed that stylesheets and scripts were being requested twice in IE8. Eventually I figured out that the problem had to do with how the character set was specified. This is how things seem to work: In IE8, pages that rely on the ...
For a few years I’ve been using this little bookmarklet, written by Abe Fettig, on my iPhone to view page source in Mobile Safari. It works well, but unfortunately the output is not optimized for viewing on the iPhone. Because I use the bookmarklet so infrequently, it’s never really bothered me. Then I installed the ...
If you work on sites with ads you know that few things can muck up your efforts to improve a site’s performance like an ad server–3rd party ad tags, iFrames, lots of document.write, and almost all of it out of your control. In his P3PC series, Steve Souders is currently analyzing the performance of popular ...
Serving static content from a cookieless domain is a standard performance best practice, one you’ve surely encountered if you’ve used a performance analysis tool like YSlow or Page Speed. The concept is simple—don’t serve static content like images and stylesheets from a domain that sets cookies—but exactly how to achieve this might not be clear ...
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