From 1e6f5344d66808b413146017b3f49fbd40dbcdf8 Mon Sep 17 00:00:00 2001
From: Kevin Gozali <fkg@fb.com>
Date: Thu, 31 Jan 2019 16:54:37 -0800
Subject: [PATCH] avoid double lookup of a nativemodule when resolving
 turbomodule

Summary: A simple optimization to not access `NativeModules` property twice.

Reviewed By: RSNara

Differential Revision: D13908128

fbshipit-source-id: d41cd5f855fb0176170d6bdc3ac93df5593eeca5
---
 Libraries/TurboModule/TurboModuleRegistry.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Libraries/TurboModule/TurboModuleRegistry.js b/Libraries/TurboModule/TurboModuleRegistry.js
index 54afa00af..a31f736d7 100644
--- a/Libraries/TurboModule/TurboModuleRegistry.js
+++ b/Libraries/TurboModule/TurboModuleRegistry.js
@@ -17,8 +17,9 @@ import {NativeModules} from 'react-native';
 // TODO
 function get<T: TurboModule>(name: string): ?T {
   // Backward compatibility layer during migration.
-  if (NativeModules[name] != null) {
-    return ((NativeModules[name]: any): T);
+  const legacyModule = NativeModules[name];
+  if (legacyModule != null) {
+    return ((legacyModule: any): T);
   }
 
   const module: ?T = global.__turboModuleProxy(name);