From b35b34c7612dc5c73502bd286b1f9c9041a0518a Mon Sep 17 00:00:00 2001
From: Fyodor Kupolov <fkupolov@google.com>
Date: Thu, 17 Dec 2015 14:16:51 -0800
Subject: [PATCH] Use buffering when reading preferred apps

On my test, a buffered version takes 10ms in contrast to 80 ms.

Bug: 26237300
Change-Id: I91ae05798672d243873e7447261156d5ebf3b045
---
 services/core/java/com/android/server/pm/Settings.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/services/core/java/com/android/server/pm/Settings.java b/services/core/java/com/android/server/pm/Settings.java
index 22f8e96ce69df..c40a14d09ab91 100644
--- a/services/core/java/com/android/server/pm/Settings.java
+++ b/services/core/java/com/android/server/pm/Settings.java
@@ -65,7 +65,9 @@ import com.android.server.backup.PreferredActivityBackupHelper;
 import com.android.server.pm.PackageManagerService.DumpState;
 import com.android.server.pm.PermissionsState.PermissionState;
 
+import java.io.BufferedInputStream;
 import java.io.FileNotFoundException;
+import java.io.InputStream;
 import java.util.Collection;
 
 import org.xmlpull.v1.XmlPullParser;
@@ -2789,9 +2791,9 @@ final class Settings {
             }
 
             if (PackageManagerService.DEBUG_PREFERRED) Log.d(TAG, "Reading default preferred " + f);
-            FileInputStream str = null;
+            InputStream str = null;
             try {
-                str = new FileInputStream(f);
+                str = new BufferedInputStream(new FileInputStream(f));
                 XmlPullParser parser = Xml.newPullParser();
                 parser.setInput(str, null);