Google webmaster tools as well as YSlow indicate that reducing the DNS lookups are vital for a good site performance. The Google Analytics drupal module has a feature which let you locally cache the tracking code file. The same could/should be done for the Google Ad Manager http://partner.googleadservices.com/gampad/google_service.js file. We can reuse the code of the GA module.

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jcisio’s picture

jcisio commented
Status: Active » Closed (won't fix)

Hmm toemaz, in this case I think YSlow lies. Normally this file is already in browser cache (if there are number of sites that use GAM), no need to add one more http request. It's just because YSlow can't distinguish this scenario (the same is correct with Google hosted Javascript libraries).

So I'm marking it won't fix.