From 835153ba50f08801ea507686721eead349a560a8 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Mon, 2 Oct 2017 12:22:05 -0700
Subject: [PATCH] PR feedback

---
 src/compiler/builder.ts | 2 +-
 src/compiler/program.ts | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/compiler/builder.ts b/src/compiler/builder.ts
index 9436be6e8a1..b2cdad3598a 100644
--- a/src/compiler/builder.ts
+++ b/src/compiler/builder.ts
@@ -521,7 +521,7 @@ namespace ts {
                 }
 
                 // Return array of values that needs emit
-                return arrayFrom(seenFileNamesMap.values());
+                return flatMapIter(seenFileNamesMap.values(), value => value);
             }
         }
     }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index d335ef3df85..ee1e2ea28fe 100755
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -764,8 +764,7 @@ namespace ts {
 
             for (let i = 0; i < moduleNames.length; i++) {
                 const moduleName = moduleNames[i];
-                // If we want to reuse resolutions more aggressively, we can refine this to check for whether the
-                // text of the corresponding modulenames has changed.
+                // If the source file is unchanged and doesnt have invalidated resolution, reuse the module resolutions
                 if (file === oldSourceFile && !hasInvalidatedResolution(oldSourceFile.path)) {
                     const oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
                     if (oldResolvedModule) {