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Guides and references for all six plugins. Looking for something specific?

Set up and clear the page cache
How the file-based page cache works, who it skips and when it clears itself.
Shrink HTML, CSS and JavaScript
What the three Minify toggles change in the delivered document and what they leave untouched.
Lighten scripts: defer, ?ver=, emoji, embeds
Four toggles in the “Assets” panel that reduce render blocking and unnecessary requests in the frontend.
Lazy-Load and missing image dimensions
Have images and iframes load later and avoid layout shifts caused by missing dimensions.
Database cleanup — what gets deleted
Cleanup removes entries for good; here you see exactly which ones those are and what is missing afterwards.
Browser cache, CDN and connection hints
Write cache rules into the .htaccess, rewrite asset addresses to a CDN host, prepare connections.
Set up Critical CSS
Analyse per template, compare in the preview, only then go live — and what to do when a run fails.
Check, measure and switch off image sizes
How to find out which image sizes your installation actually registers, how much space each one takes up and what happens when you switch them off.
Set up WebP and AVIF
How Kakapo Performance creates additional WebP and AVIF files on upload, delivers them via <picture>, and what to do when nothing is created.
Setting up the object cache with Redis or Memcached
From checking the PHP extension through the connection test to the written drop-in — and all the way back.
Setting up cache preloading
How to check whether your server can call itself, which addresses enter the queue and what the numbers mean after the run.
Autoload: measure the options loaded on every request and switch them
How to find out which options WordPress loads on every request, and which of them you can safely take out of the loading process.
Running the batch job over the existing media library
How to apply WebP, AVIF and metadata removal to images that were already uploaded before you switched it on.
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