From 7357a916c39545c70d02c4f69af8ead61d5721a4 Mon Sep 17 00:00:00 2001
From: Jean Lauliac <jeanlauliac@fb.com>
Date: Tue, 21 Mar 2017 05:54:08 -0700
Subject: [PATCH] packager: GlobalTransformCache: reduce asynchronicity for
 non-cached bundles

Reviewed By: davidaurelio

Differential Revision: D4745595

fbshipit-source-id: 3126fdcc11dd1c8085316457ead0cabae633d0db
---
 packages/metro-bundler/src/lib/GlobalTransformCache.js | 7 ++++---
 packages/metro-bundler/src/node-haste/Module.js        | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/packages/metro-bundler/src/lib/GlobalTransformCache.js b/packages/metro-bundler/src/lib/GlobalTransformCache.js
index 79a169ed..31d27cef 100644
--- a/packages/metro-bundler/src/lib/GlobalTransformCache.js
+++ b/packages/metro-bundler/src/lib/GlobalTransformCache.js
@@ -247,14 +247,15 @@ class GlobalTransformCache {
     });
   }
 
+  shouldFetch(props: FetchProps): boolean {
+    return this._profileSet.has(props.transformOptions);
+  }
+
   /**
    * This may return `null` if either the cache doesn't have a value for that
    * key yet, or an error happened, processed separately.
    */
   async fetch(props: FetchProps): Promise<?CachedResult> {
-    if (!this._profileSet.has(props.transformOptions)) {
-      return null;
-    }
     const uri = await this._fetcher.fetch(GlobalTransformCache.keyOf(props));
     if (uri == null) {
       return null;
diff --git a/packages/metro-bundler/src/node-haste/Module.js b/packages/metro-bundler/src/node-haste/Module.js
index 0f1892ca..5b89683e 100644
--- a/packages/metro-bundler/src/node-haste/Module.js
+++ b/packages/metro-bundler/src/node-haste/Module.js
@@ -303,7 +303,7 @@ class Module {
     callback: (error: ?Error, result: ?TransformedCode) => void,
   ) {
     const {_globalCache} = this;
-    if (_globalCache == null) {
+    if (_globalCache == null || !_globalCache.shouldFetch(cacheProps)) {
       this._transformCodeForCallback(cacheProps, callback);
       return;
     }