Why is aspx so "slow" and aspx "slow"

Why is aspx so "slow" and aspx "slow"

First, you need to understand what viewstate: a hidden domain generated by the system, which is used to maintain the Page Status and stores the Ispostback for determining whether the page is submitted, and some status and data about server controls;

(Note: ViewState is the control of the server side. If there is no ViewState, the control cannot be used because the control state data is stored in viewState)

In addition, every time the page interacts with the server, the viewState will be submitted to the server. After the server completes processing, the viewState will be played to the client (PAGE). If the viewState is small, it will not be affected,

However, once you use a large control on the server side, you will find that your viewState is so large that you can't bear to look directly at it. This stinks and long stuff will be uploaded to the server every time, the server will also be passed back (this way, when aspx is so slow, it is caused by viewState (mainly controls ))