I'm starting a new development of a site and checking constantly with GTMetrix the Page load & YSlow.
All was almost perfect 'till I placed a Google ad from AdSense.
This is the report just before I placed the script:
and after I place the script (only one):
As can be seen, the performance fall down drastically. The number of request is big.
Is there any way I can do to improve this?
By the way, the script is placed just before thw tag with the following:
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js" defer="defer"></script>
<script defer="defer">
(adsbygoogle = window.adsbygoogle || []).push({});
</script>