quickInstall

playground/package.json

   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "postinstall": "node ./scripts/postinstall.js",
+    "quickinstall": "node ./scripts/quickInstall.js",
     "start": "adb reverse tcp:8081 tcp:8081; watchman watch-del-all; react-native start --reset-cache",
     "xcode": "open ios/playground.xcodeproj",
     "android": "cd android && ./gradlew installDebug",

playground/scripts/postinstall.js → playground/scripts/quickInstall.js

   shellUtils.exec.execSync(`rm ../${navigationTar}`);
 }
 
-function run() {
+function copyNodeModulesFromNavigation() {
   shellUtils.exec.execSync(`cp -rf ../node_modules ./`);
-  shellUtils.exec.execSync(`./scripts/ignoreReactWarnings.rb`);
+}
+
+function run() {
+  exec.execSyncSilent(`hardlink ./node_modules/react-native-navigation/ -u || true`);
+  exec.execSyncSilent(`rm -rf ./node_modules || true`);
+  copyNodeModulesFromNavigation();
   installNavigation();
+  shellUtils.exec.execSync(`./scripts/ignoreReactWarnings.rb`);
+  if (!process.env.CI) {
+    exec.execSyncSilent(`hardlink ../ ./node_modules/react-native-navigation/ || true`);
+  }
 }
 
 run();

scripts/test.ios.js

 
 function run() {
   process.chdir('./playground');
-  exec.execSync(`hardlink node_modules/react-native-navigation/ -u || true`);
-  exec.execSync(`yarn install`);
+  exec.execSync(`yarn run quickinstall`);
   exec.execSync(`yarn run e2e release`);
   process.chdir('../');
 }