From 6ec09775ef3ff38d695c7e1582332947b90f922b Mon Sep 17 00:00:00 2001
From: Rafael Oleza <rafeca@fb.com>
Date: Tue, 21 Nov 2017 06:36:29 -0800
Subject: [PATCH] Upgrade uglify-es to 3.1.9

Reviewed By: davidaurelio

Differential Revision: D6309485

fbshipit-source-id: 17d8b66a2a676a9a556509e28a48ee703fc6da89
---
 packages/metro-bundler/package.json                       | 2 +-
 packages/metro-bundler/src/JSTransformer/worker/minify.js | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/metro-bundler/package.json b/packages/metro-bundler/package.json
index 198c83a4..b4ac547b 100644
--- a/packages/metro-bundler/package.json
+++ b/packages/metro-bundler/package.json
@@ -48,7 +48,7 @@
     "source-map": "^0.5.6",
     "temp": "0.8.3",
     "throat": "^4.1.0",
-    "uglify-es": "^3.1.0",
+    "uglify-es": "^3.1.9",
     "wordwrap": "^1.0.0",
     "write-file-atomic": "^1.2.0",
     "xpipe": "^1.0.5",
diff --git a/packages/metro-bundler/src/JSTransformer/worker/minify.js b/packages/metro-bundler/src/JSTransformer/worker/minify.js
index 41b5b436..2580ede5 100644
--- a/packages/metro-bundler/src/JSTransformer/worker/minify.js
+++ b/packages/metro-bundler/src/JSTransformer/worker/minify.js
@@ -50,6 +50,10 @@ function minify(inputCode: string, inputMap: ?MappingsMap) {
       includeSources: false,
     },
     toplevel: true,
+    compress: {
+      // reduce_funcs inlines single-use function, which cause perf regressions.
+      reduce_funcs: false,
+    },
   });
 
   if (result.error) {