From 9ecc0d7c53b359aa176542501ba25d3edba32344 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Reimar=20D=C3=B6ffinger?= <Reimar.Doeffinger@gmx.de>
Date: Sun, 10 Dec 2017 22:56:16 +0100
Subject: [PATCH] Use singletonList for better performance.

---
 .../hughes/android/dictionary/engine/PairEntry.java  | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/com/hughes/android/dictionary/engine/PairEntry.java b/src/com/hughes/android/dictionary/engine/PairEntry.java
index d3fb060..1589f9b 100644
--- a/src/com/hughes/android/dictionary/engine/PairEntry.java
+++ b/src/com/hughes/android/dictionary/engine/PairEntry.java
@@ -25,6 +25,7 @@ import java.io.DataOutput;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.regex.Pattern;
 
@@ -47,9 +48,14 @@ public class PairEntry extends AbstractEntry implements RAFSerializable<PairEntr
     throws IOException {
         super(dictionary, raf, index);
         final int size = dictionary.dictFileVersion >= 7 ? StringUtil.readVarInt(raf) : raf.readInt();
-        pairs = new ArrayList<PairEntry.Pair>(size);
-        for (int i = 0; i < size; ++i) {
-            pairs.add(new Pair(raf.readUTF(), raf.readUTF()));
+        // Use singletonList for better performance in common case
+        if (size == 1) pairs = Collections.singletonList(new Pair(raf.readUTF(), raf.readUTF()));
+        else
+        {
+            pairs = new ArrayList<PairEntry.Pair>(size);
+            for (int i = 0; i < size; ++i) {
+                pairs.add(new Pair(raf.readUTF(), raf.readUTF()));
+            }
         }
     }
 
-- 
2.43.0