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  • Book Overview & Buying Responsive Design High Performance
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Responsive Design High Performance

Responsive Design High Performance

By : Els
3 (2)
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Responsive Design High Performance

Responsive Design High Performance

3 (2)
By: Els
Buy this Book

Overview of this book

This book is ideal for developers who have experience in developing websites or possess minor knowledge of how responsive websites work. No experience of high-level website development or performance tweaking is required.
Table of Contents (11 chapters)
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Preface
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Preface
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What is responsive design, anyway?
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. The Good, the Bad, and the Ugly of Responsive Web Design
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1. The Good, the Bad, and the Ugly of Responsive Web Design
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The good – appearance and management
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The bad – slow load times and unresponsive interactions
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The ugly – the effects of slow performance
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Summary
2
2. Tweaking Your Website for Performance
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2. Tweaking Your Website for Performance
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Resource placement on the DOM
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Adjusting the sections
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DNS prefetching
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Too many DOM Elements
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Summary
3
3. Managing Images
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3. Managing Images
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Choosing the correct image format
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Optimizing images
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Conditional loading
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One-to-many DOM elements
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Specifying sizes and media queries and introducing sprite sheets
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Caching
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Scaling
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Retina displays
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Summary
4
4. Learning Content Management
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4. Learning Content Management
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Style sheets, media queries, and viewports
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Sassy CSS, SASS, and LESS
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Background images and media queries
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Using JavaScript to ease the load
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Conditional content management
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The server side with PHP
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Parallel downloads
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Content Delivery Networks
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Fonts
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Summary
5
5. The Fastest HTTP Request is No HTTP Request
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5. The Fastest HTTP Request is No HTTP Request
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Reducing the number of requests
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Combining files
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Server-side optimization with Apache
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Compression
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ETags
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Expires headers
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File concatenation
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AppCache
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Summary
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6. Testing, Testing, and Testing!
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6. Testing, Testing, and Testing!
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Beginning your testing adventure
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Back to the responsive stuff
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Summary
7
7. Speeding Up Development with Design Concepts, Patterns, and Programs
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7. Speeding Up Development with Design Concepts, Patterns, and Programs
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Design concepts
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Summary
8
8. Using Tools for Performance
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8. Using Tools for Performance
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Planning
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Developing
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Managing code changes
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Summary
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A. Taking the Next Steps
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A. Taking the Next Steps
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An overview of what we've covered so far
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A few references for further reading
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Summary
10
Index
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Index

ETags

An article on ETags by Yahoo developers at https://developer.yahoo.com/blogs/ydn/high-performance-sites-rule-13-configure-etags-7211.html, states that:

"Entity tags (ETags) are a mechanism that web servers and browsers use to determine whether the component in the browser's cache matches the one on the origin server. (An "entity" is another word a "component": images, scripts, style sheets, etc.) ETags were added to provide a mechanism for validating entities that is more flexible than the last-modified date. An ETag is a string that uniquely identifies a specific version of a component. The only format constraints are that the string be quoted. The origin server specifies the component's ETag using the ETag response header."

ETags are very handy in conjunction with caching. It compares the item in cache and then redownloads it if it has changed. It also prevents the content from getting stuck in the cache when it needs to change.

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Programming languages
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