Before buying a faster host, look at what every page loads for nothing.
Emoji script
Browsers show emojis natively. The extra script and styles are not needed.
jQuery Migrate
Only very old themes and plugins need it.
Dashicons for visitors
The admin icon font is often loaded for everyone, but only logged-in users need it.
Extra head tags
Generator, shortlink and old editor links add weight and reveal your WordPress version.
Then measure
Check with PageSpeed Insights before and after. Then look at images and caching, which matter most.
Cleanly removes all this, one switch at a time. See the demo and should you disable XML-RPC.
Frequently asked questions
Will removing these break my site?
Rarely; each tweak can be switched back on.
What speeds up WordPress most?
Caching, optimized images and good hosting.
Does it help Core Web Vitals?
Fewer requests and smaller pages help.