cache proxy state

Author: dai-shi

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Change Log
 
 ## [Unreleased]
+### Changed
+- Cache proxy state for more performance
 
 ## [1.1.0] - 2019-02-17
 ### Changed

dist/index.js

@@ -60,11 +60,21 @@ var useReduxState = function useReduxState() {
     lastState.current = state;
   }); // trapped
 
+  var proxyMap = (0, _react.useRef)(new WeakMap());
+  var trappedMap = (0, _react.useRef)(new WeakMap());
   var lastTrapped = (0, _react.useRef)(null);
-  var trapped = (0, _proxyequal.proxyState)(state);
+  var trapped;
   (0, _react.useEffect)(function () {
     lastTrapped.current = trapped;
-  }); // subscription
+  });
+
+  if (trappedMap.current.has(state)) {
+    trapped = trappedMap.current.get(state);
+  } else {
+    trapped = (0, _proxyequal.proxyState)(state, null, proxyMap.current);
+    trappedMap.current.set(state, trapped);
+  } // subscription
+
 
   (0, _react.useEffect)(function () {
     var callback = function callback() {

src/index.js

@@ -57,11 +57,19 @@ export const useReduxState = () => {
     lastState.current = state;
   });
   // trapped
+  const proxyMap = useRef(new WeakMap());
+  const trappedMap = useRef(new WeakMap());
   const lastTrapped = useRef(null);
-  const trapped = proxyState(state);
+  let trapped;
   useEffect(() => {
     lastTrapped.current = trapped;
   });
+  if (trappedMap.current.has(state)) {
+    trapped = trappedMap.current.get(state);
+  } else {
+    trapped = proxyState(state, null, proxyMap.current);
+    trappedMap.current.set(state, trapped);
+  }
   // subscription
   useEffect(() => {
     const callback = () => {