The reason why you should limit cookie sizes is request round trip. A typical GET request involves multiple headers, including cookies. Cookies are sent for ev

The reason why you should limit cookie sizes is request round trip. A typical GET request involves multiple headers, including cookies. Cookies are sent for every request for any resource for a given domain. The more cookies you have, and the bigger they are, the bigger your request. The bigger your request, the more likely it is to take longer to send and receive it. The more of them you send, the more latency accumulates. When The Cookie Crumbles https://yuiblog.com/blog/2007/03/01/performance-research-part-3/ https://yuiblog.com/blog/2007/03/01/performance-research-par... Reduce Cookie Size https://developer.yahoo.com/performance/rules.html#cookie_size https://developer.yahoo.com/performance/rules.html#cookie_si... Performance Limits https://stackoverflow.com/a/6963585 https://stackoverflow.com/a/6963585