Velocity Lightening Demos

Lightning Demos

Simon Perkins (Simtec Limited), Eric Goldsmith (AOL), Jaime Yap (Google), Eric Lawrence (Microsoft)
10:40am Thursday, 06/24/2010
Keynotes Ballroom ABCD
This is presentation will be streamed live along with the other keynotes.
Demos from HttpWatch, AOL Pagetest, Speed Tracer, and Fiddler.

AOL Pagetest

For more than two years, WebPagetest has been a leading tool for Web page performance measurement.

Now WebPagetest provides visual performance information via screen capture. You can correlate screen shots with waterfall diagrams to see what the screen looked liked at each moment of a page load. What’s more, you can perform side-by-side screen capture comparisons of two or more sites, and generate stand-alone video and filmstrip comparisons.

In addition, WebPagetest now provides CPU and memory utilization information during a page load, displayed, and synchronized with the waterfall diagram.

Speed Tracer

Speed Tracer is a tool to help you identify and fix performance problems in your web applications. It visualizes metrics that are taken from low level instrumentation points inside of the browser and analyzes them as your application runs.

I plan to give a quick overview of the Speed Tracer UI and then show off some of Speed Tracer’s new features. These include symbol de-obfuscation, full stack traces, server side traces, and integration with the Google Plugin for Eclipse.

Simon Perkins

Simtec Limited
Simon Perkins is the CEO and Founder of Simtec Limited

Eric Goldsmith

Eric Goldsmith, Operations Architect at AOL, has more than 20 years of experience providing technical leadership in the areas of product development, engineering and operations. At AOL he has led efforts to deliver the highest levels of performance and availability for top Web sites, including:;; and AOL Video; among others.

His areas of expertise include Performance Analysis, Capacity Planning, Network Engineering, and Software Development. Prior to AOL, Eric worked for companies such as UUNet, WorldCom and CompuServe, as well as telecom and Internet startups. He holds a BS in Computer Science from The Ohio State University.

Jaime Yap

Jaime Yap is a Software Engineer on the Google Speed Tracer team. He is a contributor to the Google Web Toolkit project and loves pushing the boundaries for what can be accomplished in the browser.

Jaime earned his Masters degree in Computer Science from the Georgia Institute of Technology in 2007, and has been with Google since 2008. He currently resides in Atlanta and enjoys long walks on the beach

Eric Lawrence

Eric Lawrence is a Program Manager on the Internet Explorer team, author of the IEInternals blog, and developer of the Fiddler Web Debugger.

Notes on the Session

HTTP Watch

  • Include browser events
  • Support IE and FF
  • Detection of potential problems
    • Includes about 20+ rules
  • HAR file export/import capabilities
  • Can select columns


  • Developed for internal testing at AOL
    • Actually runs as a desktop module to plug into IE
  • Supports IE7/8
  • Object level timings and visualizations
  • Multiple Connections speeds and locations
  • Optimization report suggests performance importants
  • Share test results and view historic problems
  • What’s new
    • More test locations (5 to 12 more coming)
    • Custom Bandwidth Configuration
    • Browser resource utilization (CPU and Network)
    • Visual performance comparisons
    • HTTP archive 404

Speed Tracer

  • Performance monitoring tool for Chrome
    • It’s a chrome extension
  • Derived from PageSpeed Rules
  • Timeline capability
    • Shows browser events
  • Plugs into Eclipse with the Google Plugin


  • Introduced FiddlerCap WebBrowser for users in the field (This is awesome)
    • Available in (4) languages
  • Side-by-Side viewer (-viewer command)
  • Extension called Differ
  • Can now replay a HAR file and SAZ format
    • Will support latency in future
  • IE9 does a better job with caching
    • Prompted more information to be captured about caching
  • Hosting FiddlerCore
    • Integrate with your application

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