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High.Performance.Mobile.Web.14919125

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Today, mobile is a must for every company, but how you reach users will determinate success or failure. Over high-latency and unreliable cellular networks, performance on mobile is the key to success and conversion. Early Release! This book will give you the knowledge and tools to measure your mobile website or webapp performance, how to find bottlenecks and the tips to deliver the fastest possible experience to end-users. Table of Contents Chapter 1. The Mobile Web World Chapter 2. Where to measure performance Chapter 3. Optimizing for the first visit
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Maximiliano Firtman
High Performance Mobile Web

High Performance Mobile Web
by Maximiliano Firtman
Copyright © 2010 Maximiliano Firtman. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are
also available for most titles (http://safaribooksonline.com). For more information, contact our corporate/
institutional sales department: 800-998-9938 or [email protected].
Editor: Brian Anderson
Production Editor: FIX ME!
Copyeditor: FIX ME!
Proofreader: FIX ME!
Indexer: FIX ME!
Cover Designer: Karen Montgomery
Interior Designer: David Futato
Illustrator: Rebecca Demarest
:
First Edition
Revision History for the First Edition:
2015-07-10: Early release revision 1
See http://oreilly.com/catalog/errata.csp?isbn=9781491912522 for release details.
Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly
Media, Inc. !!FILL THIS IN!! and related trade dress are trademarks of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as
trademarks. Where those designations appear in this book, and O’Reilly Media, Inc. was aware of a trademark
claim, the designations have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the publisher and authors assume
no responsibility for errors or omissions, or for damages resulting from the use of the information contained
herein.
ISBN: 978-1-491-91252-2
[?]

Table of Contents
1.
The Mobile Web World. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Form factors 2
Mobile Hardware 2
Mobile Networks 3
Distribution 4
Bandwidth 5
Latency 5
Radio state 6
Mobile Operating Systems 6
Engines 8
Rendering engines 8
Execution engines 9
Web Platforms 10
Web Apps 10
Web Views 17
Web Browsers 23
Stats 24
Cloud vs Direct Browsers 25
Pre-installed browsers 26
iOS Browsers 26
Android Browsers 27
Windows Browsers 32
The differences 32
2.
Where to measure performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Simulators & Emulators 34
Android 35
Safari on iOS 41
Internet Explorer 43
iii

Microsoft Edge 46
Real devices 46
Open Device Lab 47
Cloud-based services 48
Connections 52
Connection Simulators 52
Picking the right target 57
3.
Optimizing for the first visit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
The HTTP side 59
HTTP Version 60
Redirections 66
App (Spam) Banner 68
Requests 76
HTML 82
Semantic Web 82
Flush the HTML early 82
DNS Prefetching 83
HTML Compression 84
CSS 85
Internal vs External 85
Only one external file 86
Loading External CSS 86
Minifying 88
Web Fonts 88
JavaScript 92
Internal vs External 92
Minifying 93
Loading External JavaScript 93
Only one external file 97
Load Events 97
Images 97
Inline images 98
Image Files 99
CSS Spriting 100
Conclusion 101
iv | Table of Contents
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