http://www.loveyuki.com/Comment/Index.aspxArticle/Faster_LookUP_HashTable_Net.aspxzh-CNloveyuki@gmail.comSun, 21 Oct 2007 16:07:39 GMTCopyright 2007. All rights reserved.L-BLOG.NET, The Matrix Reloaded.http://www.loveyuki.com/Images/banner.gifhttp://www.loveyuki.com/http://www.loveyuki.com/Article/Faster_LookUP_HashTable_Net.aspx#CommentAnchor_76星辉一冷Sat, 24 Nov 2007 18:25:22 GMThttp://www.loveyuki.com/Article/Faster_LookUP_HashTable_Net.aspx#CommentAuchor_76受教了~]]>http://www.loveyuki.com/Article/Faster_LookUP_HashTable_Net.aspx#CommentAnchor_1161tingWed, 16 Apr 2008 13:14:26 GMThttp://www.loveyuki.com/Article/Faster_LookUP_HashTable_Net.aspx#CommentAuchor_1161以下代码运行时间
Execution time was 694511.1 microseconds.
Execution time was 971042.1 microseconds.
Execution time was 92339.1 microseconds.
可见有更强的速度

Dictionary<string, string> dic = new Dictionary<string, string>();
Hashtable objHash = new Hashtable();
for (Int32 intI = 0; intI < 1000000; intI++)
{
dic.Add("Key_" + intI.ToString(), "Value_" + intI.ToString());
objHash.Add("Key_" + intI.ToString(), "Value_" + intI.ToString());
}
String strValue = String.Empty;
Stopwatch timer = new Stopwatch();
timer.Start();
for (Int32 intI = 0; intI < 1000000; intI++)
{
Object objValue = objHash["Key_" + intI.ToString()];
if (objValue != null)
{
strValue = (String)objValue;
}
}
timer.Stop();
Debug.WriteLine(string.Format("Execution time was {0:F1} microseconds.", timer.Elapsed.Ticks / 10m));
timer.Reset();
timer.Start();
for (Int32 intI = 0; intI < 1000000; intI++)
{
if (objHash.ContainsKey("Key_" + intI.ToString()))
{
strValue = (String)objHash["Key_" + intI.ToString()];
}
}
timer.Stop();
Debug.WriteLine(string.Format("Execution time was {0:F1} microseconds.", timer.Elapsed.Ticks / 10m));
timer.Reset();

timer.Start();
for (Int32 intI = 0; intI < 100000; intI++)
{
if (dic.ContainsKey("Key_" + intI.ToString()))
{
strValue = dic["Key_" + intI.ToString()];
}
}
timer.Stop();
Debug.WriteLine(string.Format("Execution time was {0:F1} microseconds.", timer.Elapsed.Ticks / 10m));
timer.Reset();]]>