The performance cost.
HOW PLUGINS SLOW A SITE
Loading scripts and styles on every page, including pages that do not use them Database queries on every request External requests to other servers Heavy processing
THE EVERY-PAGE PROBLEM
A contact form plugin loading its scripts on every page, when you have one contact page.
Common, and wasteful.
HOW TO IDENTIFY HEAVY PLUGINS
Deactivate one, measure, reactivate.
Or a query-monitoring plugin showing what each adds.
WHAT TENDS TO BE HEAVIEST
Page builders Sliders Security plugins scanning Statistics plugins Anything polling an external service
WHAT TO DO
Remove what you do not need Check whether a plugin can be limited to specific pages Replace heavy plugins with lighter alternatives
SOME OPTIMISATION PLUGINS
Allow disabling specific plugins on specific pages.
Useful for form and builder scripts.
THE SIMPLEST GAIN
Removing plugins you do not use.