What is DTM Server response time / DTM library size / DTM Load time /Tips for optimizing load performance?
Please see below link for more info -
Placing the DTM embed code outside of the header is unsupported. Doing so will lead to unexpected results and issues with various solutions deployed via DTM.
As for Google's PageSpeed insight, I can't speak to how to tool calculates these points, but you can measure real world performance of the page in the browser's dev tools and you will likely see minimal if any impact from deploying DTM.
the problem I have with the synchronous include in <head> is that I get a pretty huge penalty in pagespeed.
You write "should" be hard-coded in head - What happens if I put it near the end of the page instead?
Do you have any experience already with this problem and maybe even some workaround or fix?
In my example I got a penalty of 37 points after implementing Adobe Analytics with PageSpeed Insights from Google (Mobile)