Also, if your hosting service hasn't set up caching for you, then adding browser-based caching can speed up your website considerably by eliminating the need to send various elements at all. This is what I have in .htaccess for an Apache-based host
ExpiresDefault "access plus 12 month"
Pulling an element from the browser cache is far faster than any across-the-internet transfer
At this moment I'd only like to note that under my domain there are a few other subdomains:
besides webtrees 2.0 there are two WordPress sites, two Mediawiki sites and one Piwigo.
All of them are successfuly gzip compressed.
This is what I said earlier in this thread. The webtrees 1.7 was gzip compressed successfuly, too.
webhosting:-- webtrees 2.0.11, PHP version 7.4.14, MySQL 5.7.21, testing webtrees 2.0.11
local desktop:-- webtrees 2.0.12-dev, PHP version 7.4.3, MySQL 8.0.21, Apache2 2.4.29, Linux Ubuntu 20.04 64bit