The Lag is Unreal

First off, I love this app, very useful for homework and to check answers. However, after the last update it began to lag. The moment you leave the app it begins to lag when you come back. This is truly irritating, and it not only complicates things but you will have to reopen the app and impute your data again- which is time consuming. Please fix the lag so the app may once again be amazing
Thank you.

Xsosa99 about Desmos Graphing Calculator