diff --git a/packager/src/Resolver/polyfills/prelude.js b/packager/src/Resolver/polyfills/prelude.js
index 0451a75bed8..38170fa115c 100644
--- a/packager/src/Resolver/polyfills/prelude.js
+++ b/packager/src/Resolver/polyfills/prelude.js
@@ -13,4 +13,6 @@
 
 global.__DEV__ = false;
 
-global.__BUNDLE_START_TIME__ = Date.now();
+global.__BUNDLE_START_TIME__ = global.nativePerformanceNow
+ ? global.nativePerformanceNow()
+ : Date.now();
diff --git a/packager/src/Resolver/polyfills/prelude_dev.js b/packager/src/Resolver/polyfills/prelude_dev.js
index 0f086fb9bfb..caf05c283bd 100644
--- a/packager/src/Resolver/polyfills/prelude_dev.js
+++ b/packager/src/Resolver/polyfills/prelude_dev.js
@@ -13,4 +13,6 @@
 
 global.__DEV__ = true;
 
-global.__BUNDLE_START_TIME__ = Date.now();
+global.__BUNDLE_START_TIME__ = global.nativePerformanceNow
+ ? global.nativePerformanceNow()
+ : Date.now();