I ran NPS URL through my goto web tester to get a quick idea of what is causing the slow loading. Anyone can run the GTMetrix test from their Browser. ( I always run and retest 2x) to get the best results.
NPN has a lot of image content, and most of it is not optimized and is not correctly scaled, which is causing some of the load time issues. There seem to be other issues that may not be addressed by developers. Image optimization and scaling can be a difficult metric to fix. These types of scores are not unusual for sites like this.
The most crucial metric is Fully loaded Time, and for me, 3.5 sec is acceptable.
On my Word Press site, My scores are A and load 1.2sec, but I’m not in the same league with content that NPN provides., However, it took me many months to address all the issues that are tested. Maybe Dave and the team can benchmark competitive sites and see how we compare.
The other test is from Google; they look at different parameters than GTmetrix. A google score of 85 is very respectable.
The page loading time is also around 3.6 sec.
The granddaddy and most trusted WEB page test combines Gtmatrix and google and identifies the issue with NPS Performance.
This test also shows page render time at 3.6 sec
I’m just putting this info out there because it is publicly available and might help understand where the ‘back-office’ loading pinch points are.
Years ago, when I worked with developers, I used these three web performance site metrics for goals. Some of this stuff is costly.
The ‘front-office’ of NPS provides a 3.5 sec render which is very good given all the image content
The “back-office” has room to improve, but it is a balancing act between cost/performance.
Hope that helps