# immer 的原理是什么，为什么它的性能更高
Issue
欢迎在 Gtihub Issue 中回答此问题: Issue 632 (opens new window)
Author
const state = {
user: { id: 3 },
role: { name: "admin" },
};
const proxyState = new Proxy(state, {
get(target, prop) {
return target[prop];
},
});
//=> True
state !== proxyState;
//=> True
state.user === proxyState.user;