1. Example of implementation with Google ads

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