From 836a58775f30bc08f2cef02362de7e9e88d69fe4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A0=B4=E5=A8=83=E9=85=B1?= <mmgac001@gmail.com>
Date: Thu, 15 Sep 2016 10:14:33 +0800
Subject: [PATCH] optimize LogMessageTextBox (#719)

* optimize LogMessageTextBox

* StringBuilder instead
---
 shadowsocks-csharp/View/LogForm.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/shadowsocks-csharp/View/LogForm.cs b/shadowsocks-csharp/View/LogForm.cs
index a77a961..0c36085 100644
--- a/shadowsocks-csharp/View/LogForm.cs
+++ b/shadowsocks-csharp/View/LogForm.cs
@@ -10,6 +10,7 @@ using Shadowsocks.Controller;
 using Shadowsocks.Properties;
 using Shadowsocks.Model;
 using Shadowsocks.Util;
+using System.Text;
 
 namespace Shadowsocks.View
 {
@@ -162,9 +163,11 @@ namespace Shadowsocks.View
                 }
 
                 string line = "";
+                StringBuilder appendText = new StringBuilder(1024);
                 while ((line = reader.ReadLine()) != null)
-                    LogMessageTextBox.AppendText(line + Environment.NewLine);
+                    appendText.Append(line + Environment.NewLine);
 
+                LogMessageTextBox.AppendText(appendText.ToString());
                 LogMessageTextBox.ScrollToCaret();
 
                 lastOffset = reader.BaseStream.Position;
@@ -182,14 +185,16 @@ namespace Shadowsocks.View
 
                     string line = "";
                     bool changed = false;
+                    StringBuilder appendText = new StringBuilder(128);
                     while ((line = reader.ReadLine()) != null)
                     {
                         changed = true;
-                        LogMessageTextBox.AppendText(line + Environment.NewLine);
+                        appendText.Append(line + Environment.NewLine);
                     }
 
                     if (changed)
                     {
+                        LogMessageTextBox.AppendText(appendText.ToString());
                         LogMessageTextBox.ScrollToCaret();
                     }