2. • Pages are complex: lots of resources from
various domains
• A lot of what's loaded is third party content
We need unobstrusive loading
techniques to get better perfs.
3. On TGU FR Homepage, we have 3 DFP
(Doubleclick for Publishers) ads
Impact:
15 HTTP requests, 78KB total
Scripts block the page’s content from downloading
4. Concept
iframe on the same origin that serves remote content
How is it possible?
The previous heavy script is replaced with a very small
script that only creates the iframe
Inside this iframe, it executes the heavy time-
consuming script that will get the ads
It creates another friendly iframe that contains the ad
5. Why is a friendly iframe that
awesome?
Ads can be loaded in parallel with the rest of the page
Start of loading ads can be delayed, regardless of tag
placement (not possible with either standard method)
Ads may be loaded using AJAX or other dynamic
coding frameworks, without introducing compatibility
issues due to ads using document.write() etc.
Gives the ad access to the DOM of the page, allowing
interstitials, expanding ads, resizing the iframe…
6. With his new DFP ads, Google offers the
best current solution
The script that creates the iframe is asynchronous
The single request mode : 1 HTTP request for all ads
slots
Asynchronously refreshing ad slots
Support for expanding ads
