dont update state if memoized

Author: theKashey

src/Memoizer.js

@@ -21,10 +21,12 @@ const createMemoizer = (memoizationFunction) => {
       const { calculateResult } = state;
       const { children, compute, pure, ...rest } = props;
       const result = state.calculateResult(rest);
-      return {
-        calculateResult,
-        result,
-      };
+      if(result !== state.result) {
+        return {
+          result
+        };
+      }
+      return null;
     }
 
     state = {

src/Waterflow.js

@@ -12,6 +12,8 @@ export class MemoizedFlow extends React.Component {
     /* eslint-enable */
     flow: PropTypes.arrayOf(PropTypes.func).isRequired,
     children: PropTypes.func.isRequired,
+
+    pure: PropTypes.bool
   };
 
   static getDerivedStateFromProps(props, state) {
@@ -25,7 +27,7 @@ export class MemoizedFlow extends React.Component {
   };
 
   shouldComponentUpdate(nextProps, nextState) {
-    return nextState.value !== this.state.value;
+    return !this.props.pure || nextState.value !== this.state.value;
   }
 
   render() {