From ce0e348ded9cb7e180588476ebb5a8f3e0460f4e Mon Sep 17 00:00:00 2001
From: Jon Skeet <skeet@pobox.com>
Date: Thu, 11 Jun 2015 14:32:19 +0100
Subject: Optimize WriteRawInt32 for the common case of a value < 128, which is
 a single byte. Aside from anything else, this will be used for all tags for
 fields 1-15.

---
 csharp/src/ProtocolBuffers/CodedOutputStream.cs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'csharp/src')

diff --git a/csharp/src/ProtocolBuffers/CodedOutputStream.cs b/csharp/src/ProtocolBuffers/CodedOutputStream.cs
index c817a20b..f55f8ca2 100644
--- a/csharp/src/ProtocolBuffers/CodedOutputStream.cs
+++ b/csharp/src/ProtocolBuffers/CodedOutputStream.cs
@@ -1033,6 +1033,13 @@ namespace Google.Protobuf
         /// </summary>
         public void WriteRawVarint32(uint value)
         {
+            // Optimize for the common case of a single byte value
+            if (value < 128 && position < limit)
+            {
+                buffer[position++] = (byte)value;
+                return;
+            }
+
             while (value > 127 && position < limit)
             {
                 buffer[position++] = (byte) ((value & 0x7F) | 0x80);
-- 
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