IMAGES – big images slow down websites FACT if after I have built a site you put up large files then YOU will be slowing your site down..
FUNCTIONS – JScript and functions can slow a site if you have a website that has to do literally every function known to man… If you change function or update plugins these need to be checked. JScript that run constantly on a site will slow it down. ie popup sales boxes, communication with accounts software
PLUGINS on a wordpress website are NOT the only thing that makes a website slow… so whether you have 10 – 100 dosen’t matter it will be which ones that are ACTIVE that matter, or compatible some free plugins may save you money but can conflict with other plugins
Do you really need the functions? (see HOMER website reference)