What effect do third party assets such as analytics and advertisers have on your site? It's a hard question to answer especially when dev/ops are not in control of the javascript that is loaded on their site. This presentation attempts to highlight the risk in third party assets, how to mitigate against that risk and starts to touch on a measure of third party performance for service level agreements.

5. #Requests by Domain

6. #Requests by Domain

7. = =

10. 1200
1000
800
600
400
200
0
-200
0 10 20 30 40 50 60 70 80 90
Mean time when nexus.ensighten.com objects are loaded
Mean download time for objects from nexus.ensighten.com
SpeedIndex

18. …provides independence of the
marketing teams from the technical
team… ”
“

19. Google Tag Manager
QuBit OpenTag
TagMan
Adobe TagManager
BrightTag
Tag Commander
SiteTag

20. 14000
12000
10000
8000
6000
4000
2000
0
Adobe TagManager
QuBit OpenTag
Google Tag Manager
TagMan
fullyLoaded loadTime visualComplete SpeedIndex kBIn render

21. Render Start
3000
2500
2000
1500
1000
500
0
Average GTM AdobeTagManager TagMan QuBit

22. 300
250
200
150
100
50
0
Number of Objects
Average TagMan QuBit AdobeTag GTM

28. 60
50
40
30
20
10
0
1 2 3 4 5 6 7 8 9
Public
Private
PA

30. https://www.igvita.com/2014/05/20/script-injected-async-scripts-considered-harmful/

31. https://www.igvita.com/2014/05/20/script-injected-async-scripts-considered-harmful/

32. https://www.igvita.com/2014/05/20/script-injected-async-scripts-considered-harmful/

34. google.com, amazon.com, apple.com, asos.com, ikea.com, netflix.com, ebay.co.uk, expedia.com, microsoft.com, msn.com, slate.com, windows.com, m.repubblica.it,
reuters.com, bbc.co.uk, booking.com, google.co.uk, livejournal.com, repubblica.it, rightmove.co.uk, techradar.com, telegraph.co.uk, amazon.co.uk, google.lk, bbc.com, cnbc.com,
asos.com, gap.com, asos.com, cj.com, ebay.it, amazon.com, zappos.com, nordstrom.com, weebly.com, gap.com, xing.com, addthis.com, focus.de, t-online.de, nike.com,
ebay.co.uk, zanox.com, shareasale.com, clickbank.com, google.it, virgilio.it, subito.it, amazon.co.uk, ebay.com, aol.com, google.com, cdiscount.com, eur.rd.yahoo.com,
microsoft.com, target.com, sears.com, shopping.yahoo.com, overstock.com, criteo.com, rightmove.co.uk, walmart.com, retailmenot.com, kohls.com, yahoo.com, imdb.com,
blogger.com, wordpress.com, webs.com, realtor.com, mtv.com, kids.msn.com, macys.com, sky.com, salesforce.com, swagbucks.com, xe.com, news.com.au, marketwatch.com,
web.de, spiegel.de, orf.at, leo.org, heise.de, statcounter.com, pantip.com, odesk.com, stumbleupon.com, reverso.net, reddit.com, bild.de, sueddeutsche.de, welt.de,
medialine.focus.de, zedo.com, allrecipes.com, adobe.com, slickdeals.net, siteadvisor.com, niketown.com, google.co.uk, bbc.co.uk, se.mobile.de, cjuniversity.com,
members.cj.com, warriorforum.com, aweber.com, warriorforum.com, froogle.google.co.uk, google.com.pk, google.ae, wikipedia.org, repubblica.it, libero.it, gazzetta.it, yam.com,
pchome.com.tw, msn.com, allocine.fr, amazon.fr, amazon.de, ebay.com.au, paypal.com, ebay.de, usps.com, cgi1.ebay.co.uk, half.ebay.com, bestbuy.com, my.yahoo.com,
tmz.com, msnmember.msn.com, google.com.au, youtube.com, yelp.com, linkedin.com, google.co.in, ask.com, yahoo.net, cnn.com, weather.com, tagged.com,
mywebsearch.com, de.dir.yahoo.com, constantcontact.com, froogle.google.com, lequipe.fr, mapquest.com, godaddy.com, slate.com, windows.com, kr.yahoo.com, ups.com,
pandora.com, about.nordstrom.com, homedepot.com, ebay.fr, fashion.about.com, chron.com, sfgate.com, tabelog.com, yahoo.co.jp, makemytrip.com, lifehacker.com,
gizmodo.com, gawker.com, gumtree.com, about.com, squarespace.com, toys.ebay.com, mobile01.com, lowes.com, my.cnn.com, taleo.net, babycenter.com, webmd.com,
womenshealth.about.com, liveleak.com, namecheap.com, vimeo.com, lemonde.fr, nypost.com, google.com.ph, flickr.com, histats.com, photobucket.com, google.com.sg,
google.com.my, rottentomatoes.com, subscene.com, hubpages.com, wordpress.org, go.com, zoho.com, typepad.com, domaintools.com, google.co.za, okcupid.com,
voc.com.cn, realestate.yahoo.com, zillow.com, trulia.com, monster.com, premierleague.com, people.com, nlm.nih.gov, udn.com, music.sohu.com, espndeportes.espn.go.com,
apple.com, family.msn.com, netflix.com, classictv.about.com, nfl.com, boards.ancestry.com, cbsnews.com, wunderground.com, msn.foxsports.com, cbc.ca, milliyet.com.tr,
usmagazine.com, urbandictionary.com, skysports.com, shopper.cnet.com, citibank.com, weddings.about.com, terraserver.microsoft.com, maps.yahoo.com, force.com,
kiehls.site.yahoo.net, usatoday.com, quote.yahoo.com, stocks.about.com, google.com.hk, bloomberg.com, smh.com.au, wsj.com, de.yahoo.com, wetter.com, gmx.net,
de.weather.yahoo.com, chip.de, mozilla.org, germaninstaller.sourceforge.net, digitalanzeige.bei.t-online.de, google.co.th, payoneer.com, indeed.com, google.com.bd,
mirror.co.uk, dailymail.co.uk, telegraph.co.uk, independent.co.uk, telegraaf.nl, google.com.vn, thefreedictionary.com, digg.com, wikimedia.org, nytimes.com, wordreference.com,
bunte.t-online.de, gutefrage.net, de.weather.com, chat.yahoo.com, seite1.web.de, media.spiegel.de, google.de, bild.t-online.de, qwikad.sourceforge.net, 24h.com.vn,
vnexpress.net, douban.com, google.ie, catalogs.google.com, nba.com, exercise.about.com, games.yahoo.com, foodnetwork.com, tinyurl.com, twitter.com, techcrunch.com,
mashable.com, nifty.com, w3.org, softonic.com, newegg.com, staples.com, mynet.com, eonline.com, store.babycenter.com, europa.eu, groups.yahoo.com, virtualearth.msn.com,
maps.expedia.com, multiples.about.com, adoption.about.com, google.co.nz, azlyrics.com, fifa.com, nikefootball.nike.com, nikewomen.nike.com, xuite.net, gamer.com.tw, t-mobile.
com, nectar.custhelp.com, shop.npr.org, fedex.com, google.nl, elance.com, surveymonkey.com, expedia.com, tripadvisor.com, validator.w3.org, google.fr, leboncoin.fr,
google.at, google.se, meetup.com, kayak.com, getresponse.com, searchengineland.com, doubleclick.com, goal.com, as.com, areport.linksynergy.com, bidvertiser.com,
forbes.com, news.cnet.com, maps.google.co.uk, kooora.com, espn.go.com, souq.com, whitepages.com, fifaworldcup.yahoo.com, search.virgilio.it, google.ch, google.ca,
wiktionary.org, wikia.com, reference.com, corriere.it, directory.virgilio.it, xda-developers.com, it.weather.yahoo.com, it.finance.yahoo.com, arianna.it, sohu.com, nownews.com,
sina.com.cn, 163.com, tianya.cn, xinhuanet.com, people.com.cn, members.sina.com.cn, taiwan.cnet.com, live.com, news.china.com, ovh.com, jeuxvideo.com, shopify.com,
myshopify.com, search-cache.ebay.com, pages.ebay.co.uk, bankofamerica.com, cgi3.ebay.com, mobile.de, aim.aol.com, dell.com, archive.org, flipkart.com, goodreads.com,
carpoint.msn.com, washingtonpost.com, interactive.wsj.com, latimes.com, huffingtonpost.com, yellowpages.com, verizonwireless.com, foxsports.com, bing.com,
windowsupdate.microsoft.com, amazon.ca, oneindia.in, rediff.com, naukri.com, moneycontrol.com, justdial.com, secureserver.net, samsung.com, hp.com, zing.vn, uol.com.br,
mercadolibre.com.ve, google.co.ve, tomshardware.com, clients.cdiscount.com, emails.nouvelobs.com, foxnews.com, abcnews.go.com, news.bbc.co.uk, accuweather.com,
de.search.yahoo.com, dir.web.de, google.bg, cnet.com, java.com, eshop.msn.com, shopping.msn.com, lefigaro.fr, fr.dir.yahoo.com, speedtest.net, sportsgambling.about.com,
msdn.microsoft.com, entrepreneur.com, go.msn.com, hostgator.com, m-w.com, update.msn.com, sourceforge.net, php.net, photos.msn.com, gamespot.com,
cbs.marketwatch.com, reuters.com, cust-supp-chat.one.microsoft.com, c.msn.com, broadcast.microsoft.com, smokepot.com.sapo.pt, terra.com.br, naver.com, google.co.kr,
daum.net, frenchfood.about.com, engadget.com, time.com, mfmag.com, people.aol.com, images.google.com, wired.com, pch.com, mlb.com, usbank.com, ehow.com, ikea.com,
classifieds.yahoo.com, edit.yahoo.com, auctions.yahoo.com, buzz.yahoo.com, moneycentral.msn.com, search.msn.com, onhealth.com, sourceforge.org, ancestry.com,
cnbc.com, box.com, absolufeminin.com, nouvelobs.com, finals.com, bbc.com, att.com, istockphoto.com, pcmag.com, doubleclick.net, shopper.com, compaqworks.com,
southwest.com, united.com, intuit.com, sportzone.com, marca.com, wikihow.com, india.com, nypostonline.com, udnnews.com, cbssports.com, awsj.com, foodtv.com,
custhelp.com, npr.org, thesaurus.com, china.com, presario.net, gameguides.com, segasages.com, chase.com, ign.com, dailymovies.com, theden.com, m.repubblica.it,
booking.com, livejournal.com, techradar.com, google.lk, nih.gov, correios.com.br, examiner.com, yesky.com, skype.com, webmoney.ru, hulu.com, etsy.com, mydown.com,
nordstrom.com, mlb.com, google.co.uk, bbc.co.uk, amazon.co.uk, ebay.co.uk, telegraph.co.uk, asos.com, rightmove.co.uk, amazon.com, thetrainline.custhelp.com, google.com,