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Measuring Mobile Web Performance v2
 

Measuring Mobile Web Performance v2

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Measuring Mobile Web Performance presentation at the London Ajax Mobile Conference 2nd July 2011. Covers the basics of web performance measurement and looks specifically at the measurement of page ...

Measuring Mobile Web Performance presentation at the London Ajax Mobile Conference 2nd July 2011. Covers the basics of web performance measurement and looks specifically at the measurement of page load speed from mobile devices.

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  • Forget what you thought you knew…
  • Here is one reason why a mobile browser isn’t the same as a desktop browser….(on Android) the “web browser” is a Java App calling a C/C++ app which calls another C app…
  • Different bandwidthDifferent latencyDifferent network layer entirely (Backhaul probably isn’t even IP-based…)
  • And if you throw in CyanogenMod you can get even better performance…
  • And if you throw in CyanogenMod you can get even better performance…
  • What type of network is it connected to?
  • I was on the Thames Clipper on my way back from the O2 after a concert. So I ran some automated testing and this graphs my results… Average32.859Median12.071Std Deviation45.691Min9.275Max156.520
  • “Snakes… on a motherf**king plane!” Network latency varies enormously…. What can we see here?The connection is relatively good at sending and receiving data. The green crosses represent packets that were actually lost which only happened for 75 of 1000.There are some crazy-high round trip times. The minimum round trip time was 107ms (which would put my home cable connection to shame) and even the median is pretty awesome at 239ms but the maximum was a whopping 20226 ms - that's more than 20 seconds!
  • Test MarkerTime (Sec)Signal Strength (ASU)19.2753212.681339.68274156.52018512.071969.28513752.86814810.1849923.1658Average32.859Median12.071Std Deviation45.691
  • 1.JavaScript timing e.g. WebTuna, Boomerang, Episodes2.Browser plug-in e.g. HTTPwatch3.Custom browser variant e.g. A Webkit-build (often used as a monitoring agent)4.Proxy timing e.g. Fiddler proxy5.Web Server Module e.g. APM solutions like AppDynamics, Dynatraceetc6.Network-level e.g. Atomic Labs Pion, Tealeaf, Coradiant
  • 2.Browser plug-in e.g. HTTPwatchBut only some mobile browsers have a plug-in architecture… and exactly what timing info that would provide… I have no idea…
  • 4.Proxy timing e.g. Fiddler proxy or Charles ProxyObserver Affect #1 = http://www.fiddler2.com/fiddler/perf/PerfMeasure.aspObserver Affect #2= http://insidehttp.blogspot.com/2005/06/using-fiddler-for-performance.html
  • 5.Web Server Module e.g. APM solutions like AppDynamics, Dynatraceetc
  • 1.JavaScript timing e.g. WebTuna, Boomerang, EpisodesYou can also use YUI Profiler I believe http://developer.yahoo.com/yui/profilerI have seen JavaScript warnings appear due to “excessive time in the onBeforeUnload event” – so keep in mind that JavaScript is a lot slower in mobile devices and hence the observer effect is larger (and the timing more accurate).
  • Network tap based solutions are great for measuring your own site, not so great for measuring 3rd party sites.PCAPPerf is limited to WiFi… which isn’t anything like the real “mobile” experience. The mobile network stack is NOT the same as the desktop stack, and the client side delay is larger also. *In theory you can use tcpdump on a rooted phone. More on that later…
  • The mobile network stack is NOT the same as the desktop stack, and the client side delay is larger also.
  • Is a tethered, rooted phone over wifi adequate to your needs?
  • Is knowing what’s happening “on the wire” enough, or do you want to understand what’s happening at the browser level?And the “mobile context” …So lets look at a few in detail…
  • Flexible solution (in theory works with every WiFi enabled phone)But WiFi isn’t mobile…And it’s a faff…
  • Essentially the PCAPPerf approach as SaaSBut it does support iPhone and Android.
  • Currently Android only but PoC code for Blackberry and iPhone exists. iPhone client in 90 to 120 days, all being well.
  • Rooted and Tethered, again…
  • Even a PC-based version of Webkit isn’t the same as webkit running on a mobile device. But useful none the less. Lots of other features and unsurprisingly there is a (expensive) Pro version “The MITE Pro annual user license is $5,000 and includes 100 hours of free remote testing. To learn more about single- and multiple-license purchases, please contact us today.”
  • The mobile network stack is NOT the same as the desktop stack, and the client side delay is larger also.

Measuring Mobile Web Performance v2 Measuring Mobile Web Performance v2 Presentation Transcript

  • Stephen Thair, Seriti Consulting, @TheOpsMgr
    London Web Performance Meetup Group, @LDNWebPerf
    Measuring mobile performance
    02/07/2011
    © Seriti Consulting
    1
  • Before we start…
    3
    Things to keep in mind
    02/07/2011
    © Seriti Consulting
    2
  • Desktop

    Mobile
    02/07/2011
    © Seriti Consulting
    3
  • A Java app calling a java app calling a C++ app using JNI to call a java app….
    02/07/2011
    © Seriti Consulting
    4
    http://assets.en.oreilly.com/1/event/60/Analyzing%20the%20Performance%20of%20Mobile%20Web_%20Challenges%20and%20Techniques%20Presentation.pdf
  • Wifi

    Mobile
    02/07/2011
    © Seriti Consulting
    5
  • WiFivs HSDPA Performance
    02/07/2011
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    6
  • Mobile

    Mobile
    02/07/2011
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  • Different Phones = Different Performance
    02/07/2011
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    http://www.anandtech.com/show/4144/lg-optimus-2x-nvidia-tegra-2-review-the-first-dual-core-smartphone/8
  • Different operating systems
    02/07/2011
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  • Different Browsers…
    02/07/2011
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    http://www.webdevelopersnotes.com/articles/mobile-web-browsers-list.php
  • Different network types…
    02/07/2011
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    http://developer.android.com/reference/android/telephony/TelephonyManager.html
  • Mobile Performance is location-dependent
    02/07/2011
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    http://mytests.3pmobile.com/context/?WyIyUFVDZHlWV2ErZHFISmxCSWFXRENnPT0iLCJEYnFYVVp3SEN4MD0iXQ%3D%3D
  • HSDPA… on a #!%&$@*ing train
    02/07/2011
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    13
    Max RTT = 20266ms
    http://blog.davidsingleton.org/mobiletcp
  • Page Load times (along the thames)
    02/07/2011
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    Off the chart (2m36s)
  • How many ways are there to measure web performance?
    And how useful are they on Mobile?
    02/07/2011
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  • 6
    02/07/2011
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  • 6Browser plug-ins
    02/07/2011
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    17
    As used in HTTPWatch, DynatraceAjax Edition etc
    But only some mobile browsers support plug-ins…
  • 5Proxy Timing
    02/07/2011
    © Seriti Consulting
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    E.g. Fiddler Proxy (http://www.fiddler2.com/Fiddler2/version.asp)
    There is no proxy settings in Android unless you root your phone (http://android-proxy.blogspot.com/)
    Only useful for WiFi…
    Beware the “observer effect”
  • 4Web Server Module
    02/07/2011
    © Seriti Consulting
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    As used by many APM solutions e.g. Dynatrace, New Relic
    Install mod_ or ISAPI filter
    Measure the RTT between web server and DB/Application tier
    Great for measuring your back-end performance
    Not much good for front end…
  • 3JavaScript Timing
    02/07/2011
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    As used in Boomerang, Episodes, GA, WebTuna etc
    OK for web pages, better with new WebTiming and NavigationTiming APIs not that mobile browsers support them…
    Relies on JavaScript and Cookies… which is problematic…
  • 2 Network level Timing
    02/07/2011
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    As used by PCAPPerf and by Atomic Labs Pion, Tealeaf, Coradiant
    PCAPPERF limited to over WiFi (otherwise you can’t capture the packets)*
    Pion, Tealeaf etc require network tap…
  • 1 Custom browser
    02/07/2011
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    As used by 3PMobile.com (on the phone) and synthetic agents (by active monitoring providers e.g. Site Confidence)
    At present this is the only way to get real OTA performance data.
  • 02/07/2011
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    So what to use?
  • 02/07/2011
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    Depends on your needs
  • 02/07/2011
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    Development
    vs
    “Real World”
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    Network perspective vsBrowser Perspective?
  • PCAPPerf Testing
    02/07/2011
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    WiFi Connection to PC
    PC acting as Wifi hotspot and capturing packets with Wireshark
    Upload pcap file to pcapperf.appspot.com
    And
    View the waterfall
    Upload
    http://code.google.com/p/pcaphar/wiki/CaptureMobileTraffics
  • Mobitest – blaze.io/mobile
    02/07/2011
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    “PCAPPerfas SaaS” + some on-device event capture + screenshots
    WiFi only
    Tethered machines in Ottawa, DC, Amsterdam
  • Mobitest / PCAPPerf waterfall
    02/07/2011
    © Seriti Consulting
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  • 3PMobile.com “Browser2”
    02/07/2011
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    Android Native Browser code instrumented for performance measurement
    Test Anywhere
    Full Mobile context – device & location & network
    Browser-level perspective
    Screenshots
    Automated Testing
  • Device Context
    02/07/2011
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  • 02/07/2011
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    Location Context
  • 02/07/2011
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    Network Context
  • 3PMobile.com “Browser2” Waterfall
    02/07/2011
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    34
    New “detail mode” hybrid waterfall
  • 02/07/2011
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  • 3pMobile Open Beta
    02/07/2011
    © Seriti Consulting
    36
    Register at www.3pmobile.com
    Download the APK & install
    Test away!
    The results from the tests shown today are available
    Username = ajaxmobile@seriticonsulting.com
    Password = ajaxmobile
    Feel free to take a look (but please don’t delete any tests not your own)
  • 02/07/2011
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    So what else is there?
  • TCP Dump on Rooted phone
    02/07/2011
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    http://www.vbsteven.be/blog/android-debugging-inspectin-network-traffic-with-tcpdump/
  • JavaScript Bookmarklets
    02/07/2011
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    Steve Souder’s Mobile Performance Bookmarlet
    http://stevesouders.com/mobileperf/mobileperfbkm.php
    None of these measure performance per se, but they can give you more information about the page (but beware of a strong “observer effect”)
  • Keynote MITE (Emulation)
    02/07/2011
    © Seriti Consulting
    40
    The free Keynote MITE emulator
    Webkit-based emulation based on device profiles
  • Debugging tools
    02/07/2011
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    Most SDK’s include debugging tools and profilers that can help you understand what’s going on
    But you are tethered to your PC (normally)
  • Watchmouse“IAM” library
    02/07/2011
    © Seriti Consulting
    42
    In-App Monitoring (IAM) is a set of libraries to help instrument your web apps. Currently iPhone only.
    Replace your app WebView calls with IAMWebView
    It will gather the performance data and beacon it out for you
    https://bitbucket.org/watchmouse/iam/
  • 02/07/2011
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    And that’s all I’ve got…
  • 02/07/2011
    © Seriti Consulting
    44
    Questions?
    Stephen Thair, Seriti Consulting, @TheOpsMgr
    Stephen.thair@seriticonsulting.com
    www.seriticonsulting.com/blog
    London Web Performance Meetup Group, @LDNWebPerf
    Monthly Meetups in Central London (near Bank)
    http://www.meetup.com/London-Web-Performance-Group/