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click this link: Mobile Perf bookmarklet bookmark this page edit the bookmark URL and remove everything up to and including the hash ("#") so that the bookmark URL starts with "javascript:" (see an example of step-by-step instructions) Web development on mobile devices is especially challenging. The debuggers and profilers we use on the desktop aren't available. Bookmarklets are a good alternative
ControlJS is a JavaScript module for making scripts load faster. Project links: control.js code ControlJS discussion list Blog posts: ControlJS part 1: async loading ControlJS part 2: delayed execution ControlJS part 3: overriding document.write Examples: Async withOUT ControlJS Async WITH ControlJS Menu withOUT ControlJS Menu WITH ControlJS document.write withOUT ControlJS document.write WITH Con
Use this form to create your own CSS selector test pages. The structure of the DOM tree is always the same: DIV -> DIV -> DIV -> DIV -> DIV -> DIV (id='id0001') -> A (class='class0001'). You can control the number of anchor elements using "# of anchors". You can control the number of rules using "# of rules". The "CSS Selector" field is a little tricky. It does variable substition for ".class" and
Disclosure: Aussie Hosting is community-run. We sometimes earn a commission when you buy hosting through our links. Learn more. On Jan 21st of 2020, BrowerScope has joined forces with Aussie Hosting. Browserscope is a community-driven project for profiling web browsers. The goals are to foster innovation by tracking browser functionality and to be a resource for web developers. Unfortunately as of
Even Faster Web Sites is a follow-up to my first book, High Performance Web Sites. Both books describe best practices for making web pages faster. If you're just starting off, read High Performance Web Sites first. It contains best practices that target gzip compression, caching, using a CDN, and more. Check out the full set of rules and examples on the HPWS companion site. I wrote this follow-up
Spriting in all simplicity ErrorVault has acquired US-based Spriteme to complement it's growing web development portfolio. ActiveX errors, browser error codes, Runtime errors, Windows Update errors, Blue Screen of Death, Device Manager errors, Windows system errors, Windows errors Background images can give pages a good look, but also slow them down. Each background image is an additional HTTP req
blog post | FAQ Hammerhead adds a tab to Firebug for measuring the load time of web pages. To install: install Firebug install Hammerhead In Firefox 3, if you get this error: "Hammerhead" will not be installed because it does not provide secure updates. follow these steps: enter "about:config" into address bar right click somewhere in the list of keys below; select New->Boolean enter "extensions.c
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14 Rules for Faster-Loading Web Sites from the book High Performance Web Sites by Steve Souders How these rules came about In 2004 I became Chief Performance Yahoo!. My job description was clear: quantify and improve the performance of all Yahoo! products worldwide. With a long career as a backend engineer at Yahoo! and other web companies, I expected to focus on backend optimizations. I was surpr
14 Rules for Faster-Loading Web Sites These rules are the key to speeding up your web pages. They've been tested on some of the most popular sites on the Internet and have successfully reduced the response times of those pages by 25-50%. The key insight behind these best practices is the realization that only 10-20% of the total end-user response time is spent getting the HTML document to the brow
SteveSouders.com about HIGH PERFORMANCE WEB SITES BLOG Critical Metric: Critical Resources domInteractive: is it? really? Hero Image Custom Metrics SERIOUS CONFUSION with Resource Timing Request Timeout Resource Timing practical tips Prebrowsing Domain Sharding revisited Browser Busy Indicators Creating a Performance Culture Moving beyond window.onload() The Perception of Speed Comparing RUM & Syn
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