Google’s PageSpeed Calculator has just revamped their site tool (https://pagespeed.web.dev/) AND their Page Speed Rating Algorithm.
Below are a series of screen captures of PageSpeed Scores for a client’s site.
The first image show the site score just after implementation earlier this year.
The second image shows the score for the same site after PageSpeed’s algorithm update, showing quite a significant drop in Score, Content Paints and Speed.
The third screenshot shows the site score after moving the Google Analytics code from the header to the footer – no other alterations were made.
Google recommends that its analytics file resides in the header as it will then capture even the briefest visit.
I would rather judge for myself whether the remote possibility of missing a <2 second bounced visit is worth the drop in page speed.
ManFridayIT offers page speed optimisation as one of its SEO services.