From d2a14842d8b8239d0f1c9e58b42da15469efa652 Mon Sep 17 00:00:00 2001
From: asl97 <asl97@outlook.com>
Date: Wed, 31 Dec 2014 18:04:34 +0100
Subject: [PATCH] avoid a busy server loop with high CPU usage

fixes #7237
---
 AUTHORS                      | 1 +
 OpenRA.Game/Server/Server.cs | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/AUTHORS b/AUTHORS
index 320522c197..3cf4e1a8e7 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -26,6 +26,7 @@ Also thanks to:
     * Andrew Perkins
     * Andrew Riedi
     * Andreas Beck (baxtor)
+    * Ang Soon Li (asl97)
     * Arik Lirette (Angusm3)
     * Barnaby Smith (mvi)
     * Bellator
diff --git a/OpenRA.Game/Server/Server.cs b/OpenRA.Game/Server/Server.cs
index db0d8115c9..c6eab4e088 100644
--- a/OpenRA.Game/Server/Server.cs
+++ b/OpenRA.Game/Server/Server.cs
@@ -156,11 +156,11 @@ namespace OpenRA.Server
 				for (;;)
 				{
 					var checkRead = new List<Socket>();
-					checkRead.Add(listener.Server);
+					if (State == ServerState.WaitingPlayers) checkRead.Add(listener.Server);
 					foreach (var c in Conns) checkRead.Add(c.socket);
 					foreach (var c in PreConns) checkRead.Add(c.socket);
 
-					Socket.Select(checkRead, null, null, timeout);
+					if (checkRead.Count > 0) Socket.Select(checkRead, null, null, timeout);
 					if (State == ServerState.ShuttingDown)
 					{
 						EndGame();