I. Much of my work on web performance has focused on JavaScript and CSS, starting with the early rules Move Scripts to the Bottom and Put Stylesheets at the Top from back in 2007(!). To emphasize these best practices I used to say, “JS and CSS are the most important bytes in the page”. A few months ago I realized that wasn’t true. Images are the most important bytes in the page. My focus on JS and CSS was largely motivated by the desire to get the images downloaded as soon as possible. My main motivation for optimizing JS and CSS is to get rendering to happen as quickly as possible. Rendering starts very late With this focus on rendering in mind, I went to the HTTP Archive to see how quickly we’re getting pages to render. Time-to-first-byte (TTFB) – When the first packet of the HTML document arrives.start render – When the page starts rendering.onload – When window.onload fires.
I extracted the 50th and 90th percentile values for these measurements across the world’s top 300K URLs. Preloading. UserTesting.com. 10 Useful Usability Findings and Guidelines « Smashing Magazine. Advertisement Everyone would agree that usability is an important aspect of Web design. Whether you’re working on a portfolio website, online store or Web app, making your pages easy and enjoyable for your visitors to use is key. Many studies have been done over the years on various aspects of Web and interface design, and the findings are valuable in helping us improve our work. Here are 10 useful usability findings and guidelines that may help you improve the user experience on your websites. 1. A study by UX Matters found that the ideal position for labels in forms is above the fields. Tumblr features a simple and elegant sign-up form that adheres to UX Matter’s recommendation.
Positioning labels on the left also poses another problem: do you left-align or right-align the labels? 2. People instinctively notice other people right away when they come into view. Eye-tracking heat map of a baby looking directly at us, from the UsableWorld study. And now the baby is looking at the content. Optimizely: A/B testing software.
Web Site Optimization Tutorials, Optimize Web Sites, Optimize CSS & HTML, Web Page Speed, Web Site Performance, Image Optimization, Crunch Code, CSS Image Sprites, GZIP Compression, Zlib Compression, PHP Compression - Articles, Tutorials, Tools, Software, Section 1: Markup and Code Optimization, Server-side Compression and Optimization - Tutorials, Research, Resources, Tools, Books Want to maximize your Web site's performance, speed up your page load times, streamline and optimize your HTML, CSS, images, and scripts? Within the Web Site Optimization section you'll find helpful annotated links to articles, tutorials, scripts, and more on optimizing CSS, HTML and XHTML, Web site images, and JavaScript as well as server-side compression and optimization, too.
Your pages can load faster, you'll save bandwidth, reduce file sizes, reduce server space, and much more by optimizing your Web site's performance. You'll also find a listing of recommended books on Web site optimization. See also Section 2: Image Optimization. Looking for search engine optimization tutorials, tips, tools, books, and more on SEO, SEM? See our section, SEO - Search Engine Optimization, SEM - Search Engine Marketing. Web Site Optimizing in General top ‘On this page’ menu.
Mobile optimizations. Tools. The fold. Css optimization.