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Patrick Meenan
Works at Google
Attended George Mason University
Lives in South Riding, VA
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Patrick Meenan

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New Android testing is now live on WebPageTest.  60FPS video capture, full timelines, nice selection of devices and coming soon as a private instance release.
We've been working for a while to bring better support for measuring web performance on mobile for a while.  Michael Klepikov started out by building out a new cross-platform test agent for WebPagetest that runs on Node.js, c...
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Patrick Meenan

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I didn't realize that Mozilla made their Firefox field performance stats public.  Lots of awesome RUM data at http://telemetry.mozilla.org/

Here are some of my favorites for using as a baseline for your own RUM metrics (setting goals, etc).  Make sure to change the preferences to show evolution over calendar dates and un-select any percentile that has a huge spike to make the graphs cleaner:

Page Load Time: http://telemetry.mozilla.org/#release/26/FX_PAGE_LOAD_MS
Median is 1.3 seconds and the 95th percentile is 10 seconds (actually a lot better than I expected)

DNS Lookup Time: http://telemetry.mozilla.org/#release/26/DNS_LOOKUP_TIME
Median is 45ms but the 95th percentile is 660ms - that's scary-long.

The RTT measured from the SPDY layer (couldn't find the TCP equivalent but it may be in there): http://telemetry.mozilla.org/#release/26/SPDY_SETTINGS_RTT 104ms median and 473ms 95th percentile.  Could be lower than the DNS numbers since SPDY is dominated by large sites right now (Google, Facebook, Twitter).

+Patrick McManus Do you know if the TCP socket connect time is in there anywhere?  That is usually a great proxy for the RTT.
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Patrick Meenan

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Yeah, you could say we enjoy Halloween :-)
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I'm totally coming to your house next year...
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Have him in circles
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Patrick Meenan

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Android web performance testing takes a big leap forward
We've been working for a while to bring better support for measuring web performance on mobile for a while.   Michael Klepikov  started out by building out a new cross-platform test agent for WebPagetest that runs on Node.js, can run WebDriver/Selenium scri...
We've been working for a while to bring better support for measuring web performance on mobile for a while.  Michael Klepikov started out by building out a new cross-platform test agent for WebPagetest that runs on Node.js, c...
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There are 2 pretty big #webperf  changes to Chrome's resource preloader that are now live in Canary and should be coming out to stable when 33 launches:

1 - The preload scanner now scans more of the document and "sees" more resources than it did before: https://code.google.com/p/chromium/issues/detail?id=284927

2 - As the browser does layout for images, it should boost the priority of visible images: https://code.google.com/p/chromium/issues/detail?id=319073

If you're doing any fancy trickery to try to get browsers to load things in a specific order it's worth testing with Canary to make sure your techniques still work (and if you're not it's still worth testing to see if the changes help your site).

If you see anything really bizarre or unexpected let us know: http://crbug.com/new (or more informally just comment here if you have a WebPagetest waterfall from Chrome Stable and Canary that you want me to look at).
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Yea, it was from Ray's presentation, I use webpagetest and tried to see how ppt works ... I haven't seen any option to export as pdf and it seems that my request is still processing :)
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Have him in circles
2,452 people
Work
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  • Google
    Software Engineer, 2010 - present
  • AOL
    Software Engineer, 1999 - 2010
  • Digital Now!
    Software Engineer
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South Riding, VA
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Fairfax, VA - Urbana, IL
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Google
Education
  • George Mason University
    Computer Science
  • University of Illinois at Urbana-Champaign
    Aerospace Engineering
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