Learn basic and advanced uses of WebPagetest, the performance measurement tool for optimizing websites. This practical guide shows users new to this tool how run tests and interpret results, and helps experienced users gain a better and more thorough understanding of hidden features in WebPagetest that make testing easier.

Written by WebPagetest power users and performance experts, this book will help web developers and frontend engineers solve the problem of slow sites. Topics include:

  • Basic test setup—shows beginners how to get meaningful results
  • Advanced test setup—provides another level of technical depth by explaining features not thoroughly documented at webpagetest.org
  • Analysis of results—helps you understand of how to interpret test results
  • Private instance setup—teaches power users the intricacies of the webpagetest private instance and how it works
  • API and external tools—provides a detailed reference for the API and demonstrates tools already using the API to extend WebPagetest

Rick Viscomi

Rick Viscomi is a front end engineer with a background in web performance. Rick is also an open source developer and has open sourced two projects: trunk8, an intelligent text truncation plugin to jQuery, and Red Dwarf, a Google Maps heatmap tool for visualizing GitHub project popularity. Since 2013, he has worked as a web developer at Google, helping to make YouTube fast.

Andy Davies

Andy Davies first stumbled into web performance in late '90s when he was trying to deliver e-learning over dial-up connection speeds and has been hooked ever since.

He's currently Associate Director for Web Performance at NCC Group, where he helps clients to measure, and improve the performance of their web sites.

Andy regularly speaks about web performance and occasionally contributes to open source projects such as WebPagetest, he also wrote 'A Pocket Guide to Web Performance" for Five Simple Steps

Marcel Duran

Marcel Duran is a web performance engineer at Google. He previously worked to speed up high traffic websites for Twitter and Yahoo! He was also the Front End Lead for Yahoo!’s Exceptional Performance Team where he open sourced YSlow. Marcel also spoke at the Velocity Conference and co-authored Web Performance Daybook Volume 2 (O'Reilly).

  • Chapter 1 “How fast is my page?”
  • Chapter 2 "What is slowing down my page?”
  • Chapter 3 Comparing Tests
  • Chapter 4 Simulating real users
  • Chapter 5 Cache optimization
  • Chapter 6 Mobile testing
  • Chapter 7 SPOF testing
  • Chapter 8 Flow view
  • Chapter 9 Authenticating
  • Chapter 10 Application-specific metrics
  • Chapter 11 API
  • Chapter 12 Continuous Integration
  • Chapter 13 Performance monitoring tools
  • Chapter 14 Private instances
  • Appendix Reference guide