Cookies, the pieces of text that we have all come to know, although sometimes annoying to users, are beneficial in many ways. Cookies can help track and enhance visitor experiences, store login information, or serve advertisements, but they can also degrade the performance of a page if not kept in check. When a user requests your page, the HTTP request that is made to the server will initiate the response for data. Keeping the size of the initial request down can help reduce the time the user has to wait for content to load. This includes keeping the cookie file size to a minimum as well. Along with reviewing the size of cookies, you should also review if any duplicate cookies exist and remove them.
Minimize Cookie Size (Deprecated)
How Cookies Affect Page Performance
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.