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TOBIAS JÄRLUND
Lead developer, Aftonbladet pappaledig
@jarlund
http://jarlund.se/
AFTONBLADET.SE
ca 6 miljoner unika webbläsare/vecka
AFTONBLADET.SE
ca 2 miljoner unika webbläsare/vardag
AFTONBLADET.SE
ca 3800 DOM-element
AFTONBLADET.SE
ca 20 annonspositioner
AFTONBLADET.SE
ca 3 miljarder http-anrop/dag
TREDJEPARTS-
INNEHÅLL
ANNONSER
<script src="...">
document.write()
HTML-sida
            Annonsnätverk 1
                        Annonsnätverk 2
                                             Annonsen



                                            Resten av sidan



                            http://www.webpagetest.org/
Sidan blockeras
  av annonsen



         http://www.webpagetest.org/
<script src="...">
blockerar rendering
(och laddning)
document.write()
omöjliggör asynkron laddning
LADDAR SERIELLT
BLOCKERAR ALLT
ANNAT INNEHÅLL
”FRONTEND SPOF”
LÖSNINGAR?
Lägg annonsen långt
ner i källkoden och
positionera den till sin
rätta plats på sidan
Definiera om
document.write()
Ladda annonsen i en
iframe
FRIENDLY IFRAME
Best Practices for
Rich Media Ads in
Asynchronous Ad
Environments
            http://www.iab.net/ajaxrichmedia
FRIENDLY IFRAME
Skapa en iframe med en statisk, cachningsbar
html-sida från samma domän.
Sätt javascriptvariabeln inDapIF=true som en
signal till annonsen att den laddas i en friendly
iframe.
Ladda annonsen som vanligt med en <script
src> i iframen.
När annonsen laddat klart, justera storleken på
iframen till att matcha annonsens storlek.
BROWSERPROBLEM
http://www.webpagetest.org/
LADDAR PARALLELLT
UTAN ATT BLOCKERA
ANNAT INNEHÅLL
NYA MÖJLIGHETER
Ladda annonser i
valfri ordning
Händelsestyrd
annonsladdning
HTML5?
DET ÄR JU ÄNDÅ 2011
<iframe srcdoc
seamless>
RESULTATET?
Besök/vecka +7%
Sidor/besök +16%
Senaste nytt +35%
Tid för sidladdning

-40%
Tobias Järlund
@jarlund
http://jarlund.se/

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Annonser och prestanda: Optimera STHLM 2011