Upgrade to RN_0.60.3 and Enable Hermes

App.js

@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { Text, View, Button } from 'react-native';
+import { Text, View, Button,StyleSheet } from 'react-native';
 import {
   createStackNavigator,
   withNavigationFocus,
@@ -23,6 +23,11 @@ class HomeScreen extends Component {
   render() {
     return (
       <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
+        {global.HermesInternal == null ? null : (
+            <View style={styles.engine}>
+              <Text style={styles.footer}>Engine: Hermes</Text>
+            </View>
+          )}
         <Text>Home Screen</Text>
         <Button
           title="Go to Flat List"
@@ -71,6 +76,21 @@ const navigatorStack = createStackNavigator(
     initialRouteName: 'HomeCart',
   },
 );
+const styles = StyleSheet.create({
+
+  engine: {
+    position: 'absolute',
+    right: 0,
+  },
+  footer: {
+    color: "#000000",
+    fontSize: 12,
+    fontWeight: '600',
+    padding: 4,
+    paddingRight: 12,
+    textAlign: 'right',
+  },
+});
 
 const App = createAppContainer(navigatorStack);
 export default App;

android/app/build.gradle

@@ -76,7 +76,8 @@ import com.android.build.OutputFile
  */
 
 project.ext.react = [
-    entryFile: "index.js"
+    entryFile: "index.js",
+    enableHermes: true,
 ]
 
 apply from: "../../node_modules/react-native/react.gradle"
@@ -103,8 +104,8 @@ def enableProguardInReleaseBuilds = false
  * when using with locales other than en-US.
  * Note that this variant is about 6MiB larger per architecture than default.
  */
-def useIntlJsc = false
-
+def jscFlavor = 'org.webkit:android-jsc:+'
+def enableHermes = project.ext.react.get("enableHermes", false);
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
 
@@ -169,6 +170,14 @@ android {
             }
         }
     }
+    packagingOptions {
+        pickFirst '**/armeabi-v7a/libc++_shared.so'
+        pickFirst '**/x86/libc++_shared.so'
+        pickFirst '**/arm64-v8a/libc++_shared.so'
+        pickFirst '**/x86_64/libc++_shared.so'
+        pickFirst '**/x86/libjsc.so'
+        pickFirst '**/armeabi-v7a/libjsc.so'
+    }
 }
 
 dependencies {
@@ -178,11 +187,13 @@ dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation "com.facebook.react:react-native:+"  // From node_modules
 
-    // JSC from node_modules
-    if (useIntlJsc) {
-        implementation 'org.webkit:android-jsc-intl:+'
+    if (enableHermes) {
+        def hermesPath = "../../node_modules/hermesvm/android/";
+        debugImplementation files(hermesPath + "hermes-debug.aar")
+        releaseImplementation files(hermesPath + "hermes-release.aar")
     } else {
         implementation 'org.webkit:android-jsc:+'
+        implementation jscFlavor
     }
 }
 

android/app/src/main/java/com/reactnativememoryprofile/MainApplication.java

@@ -1,7 +1,7 @@
 package com.reactnativememoryprofile;
 
 import android.app.Application;
-
+import android.util.Log;
 import com.facebook.react.PackageList;
 import com.facebook.react.ReactApplication;
 import com.oblador.vectoricons.VectorIconsPackage;
@@ -10,6 +10,8 @@
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
 import com.facebook.soloader.SoLoader;
+import com.facebook.hermes.reactexecutor.HermesExecutorFactory;
+import com.facebook.react.bridge.JavaScriptExecutorFactory;
 
 import java.util.List;
 

package.json

@@ -15,7 +15,7 @@
     "patch-package": "^6.1.2",
     "postinstall": "^0.4.2",
     "react": "16.8.6",
-    "react-native": "0.60.0",
+    "react-native": "0.60.3",
     "react-native-device-info": "^0.28.1",
     "react-native-elements": "^1.1.0",
     "react-native-gesture-handler": "^1.3.0",
@@ -28,13 +28,13 @@
     "redux-thunk": "^2.3.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.4.5",
-    "@babel/runtime": "^7.4.5",
+    "@babel/core": "^7.5.4",
+    "@babel/runtime": "^7.5.4",
     "@react-native-community/eslint-config": "^0.0.5",
     "babel-jest": "^24.8.0",
     "eslint": "^6.0.1",
     "jest": "^24.8.0",
-    "metro-react-native-babel-preset": "^0.54.1",
+    "metro-react-native-babel-preset": "^0.55.0",
     "node-pre-gyp": "^0.13.0",
     "react-test-renderer": "16.8.6",
     "ws": ">=3.3.1"