The fundraising application is currently still relying on HTTP/1.1 for its data transfer. We should configure our Apache instances to support HTTP/2 as it offers performance improvements when transfering data. HTTP/2 should be enabled on the test and production environments, additionally SpeedCurve should drop its performance warning about it in the "Improve" section under the "Best Practices" tab:
HTTP/2 offers many benefits over HTTP/1.1, including binary headers, multiplexing, and server push.
https://test-spenden.wikimedia.de/?skin=2
https://test-spenden.wikimedia.de/skins/laika/css/styles.css
https://test-spenden.wikimedia.de/skins/laika/js/chunk-vendors.js
https://test-spenden.wikimedia.de/skins/laika/js/styles.js
https://test-spenden.wikimedia.de/skins/laika/js/donation_form.js
https://test-spenden.wikimedia.de/skins/laika/images/logo-horizontal-wikimedia.svg
https://test-spenden.wikimedia.de/skins/laika/images/logo-vertical-wikimedia.svg
https://test-spenden.wikimedia.de/skins/laika/fonts/Open-Sans.woff2
https://test-spenden.wikimedia.de/skins/laika/fonts/Open-Sans-bold.woff2
https://test-spenden.wikimedia.de/skins/laika/images/favicon.icoReference: https://developers.google.com/web/tools/lighthouse/audits/http2