A List Apart

Issue № 371

Improving UX Through Front-End Performance

by Lara Swanson30 Comments

Adding half a second to a search results page can decrease traffic and ad revenues by 20 percent, says a Google study. For every additional 100 milliseconds of load time, sales decrease by 1 percent, Amazon finds. Users expect pages to load in two seconds—and after three seconds, up to 40 percent will simply leave. The message is clear: we must make performance optimization a fundamental part of how we design, build, and test every site we create—for every device. Design for performance; measure the results.

The Era of Symbol Fonts

by Brian Suda38 Comments

Welcome to the third epoch in web performance optimization: symbol fonts. Everything from bullets and arrows to feed and social media icons can now be bundled into a single, tiny font file that can be cached and rendered at various sizes without needing multiple images or colors. This has the same caching and file size benefits as a CSS sprite, plus additional benefits we’re only now realizing with high-resolution displays. Discover the advantages and explore the challenges you’ll encounter when using a symbol font.

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In any given day I can find myself reading up on a new W3C proposal, fixing an issue with our tax return, coding an add-on for our product, writing a conference presentation, building a server, creating a video tutorial, and doing front end development for one of our sites. Without clients dictating my workload I’m in the enviable position of being able to choose where to focus my efforts. However, I can’t physically do everything.

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“We’re at the cusp of understanding the ultimate value of web publishing platforms, particularly ones that work cross-domain.”–Matt Mullenweg of WordPress.

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