34 best Practices or rules for Speeding Up Your Web Site

This article is on 34 best Practices or rules for Speeding Up Your Web Site.Yahoo!’s Exceptional Performance team evangelizes best practices for improving web performance by conduct ing research, building tools, etc.According to Yahoo!’s Exceptional Performance team, 34 best Practices or rules for Speeding Up Your Web Site are categorized into Content, server, cookie, CSS, Javascript, images and mobile.

content rules:

• Make Fewer HTTP Requests
• Reduce DNS Lookups
• Avoid Redirects
• Make Ajax Cacheable
• Post-load Components
• Preload Components
• Reduce the Number of DOM Elements
• Split Components Across Domains
• Minimize the Number of iframes
• No 404s

server rules:

• Use a Content Delivery Network
• Add an Expires or a Cache-Control Header
• Gzip Components
• Configure ETags
• Flush the Buffer Early
• Use GET for AJAX Requests

cookie rules:

• Reduce Cookie Size
• Use Cookie-free Domains for Components

CSS rules:

• Put Stylesheets at the Top
• Avoid CSS Expressions
• Make JavaScript and CSS External
• Minify JavaScript and CSS

li>Choose <link> over @import

• Avoid Filters

Javascript rules:

• Put Scripts at the Bottom
• Make JavaScript and CSS External
• Minify JavaScript and CSS
• Remove Duplicate Scripts
• Minimize DOM Access
• Develop Smart Event Handlers

Images rules:

• Optimize Images
• Optimize CSS Sprites
• Don’t Scale Images in HTML
• Make favicon.ico Small and Cacheable

Mobile rules:

• Keep Components under 25K
• Pack Components into a Multipart Document

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