diff --git a/FastGithub.Scanner/GithubContext.cs b/FastGithub.Scanner/GithubContext.cs
index dffefca..4273e49 100644
--- a/FastGithub.Scanner/GithubContext.cs
+++ b/FastGithub.Scanner/GithubContext.cs
@@ -18,24 +18,19 @@ namespace FastGithub.Scanner
         /// <summary>
         /// 获取或设置是否可用
         /// </summary>
-        public bool Available { get; set; } = false;
+        public bool Available { get; set; }
 
         /// <summary>
-        /// 获取或设置扫描总耗时
+        /// 获取统计信息
         /// </summary>
-        public TimeSpan Elapsed { get; set; } = TimeSpan.MaxValue;
+        public GithubContextStatistics Statistics { get; } = new();
 
 
         public GithubContext(string domain, IPAddress address)
         {
             this.Domain = domain;
             this.Address = address;
-        }
-
-        public override string ToString()
-        {
-            return $"{Address}\t{Domain}\t# {Elapsed}";
-        }
+        } 
 
         public override bool Equals(object? obj)
         {
diff --git a/FastGithub.Scanner/GithubContextCollection.cs b/FastGithub.Scanner/GithubContextCollection.cs
index 3abf00d..8108aca 100644
--- a/FastGithub.Scanner/GithubContextCollection.cs
+++ b/FastGithub.Scanner/GithubContextCollection.cs
@@ -8,21 +8,12 @@ namespace FastGithub.Scanner
     {
         private readonly object syncRoot = new();
         private readonly HashSet<GithubContext> contextHashSet = new();
-        private readonly Dictionary<string, IPAddress> domainAdressCache = new();
 
-        public void AddOrUpdate(GithubContext context)
+        public bool Add(GithubContext context)
         {
             lock (this.syncRoot)
             {
-                if (this.contextHashSet.TryGetValue(context, out var value))
-                {
-                    value.Elapsed = context.Elapsed;
-                    value.Available = context.Available;
-                }
-                else
-                {
-                    this.contextHashSet.Add(context);
-                }
+                return this.contextHashSet.Add(context);
             }
         }
 
@@ -39,35 +30,16 @@ namespace FastGithub.Scanner
         /// </summary>
         /// <param name="domain"></param>
         /// <returns></returns>
-        public IPAddress? FindFastAddress(string domain)
+        public IPAddress? FindBestAddress(string domain)
         {
             lock (this.syncRoot)
             {
-                // 如果上一次的ip可以使用，就返回上一次的ip
-                if (this.domainAdressCache.TryGetValue(domain, out var address))
-                {
-                    var key = new GithubContext(domain, address);
-                    if (this.contextHashSet.TryGetValue(key, out var context) && context.Available)
-                    {
-                        return address;
-                    }
-                }
-
-                var fastAddress = this.contextHashSet
+                return this.contextHashSet
                     .Where(item => item.Available && item.Domain == domain)
-                    .OrderBy(item => item.Elapsed)
+                    .OrderByDescending(item => item.Statistics.GetSuccessRate())
+                    .ThenBy(item => item.Statistics.GetAvgElapsed())
                     .Select(item => item.Address)
                     .FirstOrDefault();
-
-                if (fastAddress != null)
-                {
-                    this.domainAdressCache[domain] = fastAddress;
-                }
-                else
-                {
-                    this.domainAdressCache.Remove(domain);
-                }
-                return fastAddress;
             }
         }
     }
diff --git a/FastGithub.Scanner/GithubContextStatistics.cs b/FastGithub.Scanner/GithubContextStatistics.cs
new file mode 100644
index 0000000..f151fd3
--- /dev/null
+++ b/FastGithub.Scanner/GithubContextStatistics.cs
@@ -0,0 +1,57 @@
+using System;
+
+namespace FastGithub.Scanner
+{
+    sealed class GithubContextStatistics
+    {
+        /// <summary>
+        /// 扫描总次数
+        /// </summary>
+        public int TotalScanCount { get; private set; }
+
+
+        /// <summary>
+        /// 扫描总成功次数
+        /// </summary>
+        public int TotalSuccessCount { get; private set; }
+
+        /// <summary>
+        /// 扫描总耗时
+        /// </summary>
+        public TimeSpan TotalSuccessElapsed { get; private set; }
+
+
+        public void SetScan()
+        {
+            this.TotalScanCount += 1;
+        }
+
+        public void SetScanSuccess(TimeSpan elapsed)
+        {
+            this.TotalSuccessCount += 1;
+            this.TotalSuccessElapsed = this.TotalSuccessElapsed.Add(elapsed);
+        }
+
+        /// <summary>
+        /// 获取成功率
+        /// </summary>
+        /// <returns></returns>
+        public double GetSuccessRate()
+        {
+            return this.TotalScanCount > 0 ?
+                (double)this.TotalSuccessCount / this.TotalScanCount
+                : 0d;
+        }
+
+        /// <summary>
+        /// 获取平均耗时
+        /// </summary>
+        /// <returns></returns>
+        public TimeSpan GetAvgElapsed()
+        {
+            return this.TotalScanCount > 0
+                ? this.TotalSuccessElapsed / this.TotalScanCount
+                : TimeSpan.MaxValue;
+        }
+    }
+}
diff --git a/FastGithub.Scanner/GithubScanService.cs b/FastGithub.Scanner/GithubScanService.cs
index 480b573..c74e9d7 100644
--- a/FastGithub.Scanner/GithubScanService.cs
+++ b/FastGithub.Scanner/GithubScanService.cs
@@ -30,18 +30,18 @@ namespace FastGithub.Scanner
             this.fullScanDelegate = pipelineBuilder
                 .New()
                 .Use<ConcurrentMiddleware>()
-                .Use<ScanElapsedMiddleware>()
-                .Use<PortScanMiddleware>()
-                .Use<HttpsScanMiddleware>()
                 .Use<ScanOkLogMiddleware>()
+                .Use<StatisticsMiddleware>()
+                .Use<PortScanMiddleware>()
+                .Use<HttpsScanMiddleware>() 
                 .Build();
 
             this.resultScanDelegate = pipelineBuilder
                 .New()
-                .Use<ScanElapsedMiddleware>()
-                .Use<PortScanMiddleware>()
-                .Use<HttpsScanMiddleware>()
                 .Use<ScanOkLogMiddleware>()
+                .Use<StatisticsMiddleware>()
+                .Use<PortScanMiddleware>()
+                .Use<HttpsScanMiddleware>() 
                 .Build();
         }
 
@@ -62,7 +62,7 @@ namespace FastGithub.Scanner
                 await this.fullScanDelegate(context);
                 if (context.Available == true)
                 {
-                    this.results.AddOrUpdate(context);
+                    this.results.Add(context);
                 }
             }
         }
@@ -83,7 +83,7 @@ namespace FastGithub.Scanner
         public IPAddress? FindFastAddress(string domain)
         {
             return domain.Contains("github", StringComparison.OrdinalIgnoreCase)
-                ? this.results.FindFastAddress(domain)
+                ? this.results.FindBestAddress(domain)
                 : default;
         }
     }
diff --git a/FastGithub.Scanner/Middlewares/ScanOkLogMiddleware.cs b/FastGithub.Scanner/Middlewares/ScanOkLogMiddleware.cs
index 18dfd16..62c68a0 100644
--- a/FastGithub.Scanner/Middlewares/ScanOkLogMiddleware.cs
+++ b/FastGithub.Scanner/Middlewares/ScanOkLogMiddleware.cs
@@ -1,6 +1,7 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using System;
+using System.Net;
 using System.Threading.Tasks;
 
 namespace FastGithub.Scanner.Middlewares
@@ -10,19 +11,29 @@ namespace FastGithub.Scanner.Middlewares
     {
         private readonly ILogger<ScanOkLogMiddleware> logger;
 
+        private record ScanOk(string Domain, IPAddress Address, int TotalScanCount, double SuccessRate, TimeSpan AvgElapsed);
+
         public ScanOkLogMiddleware(ILogger<ScanOkLogMiddleware> logger)
         {
             this.logger = logger;
         }
 
-        public Task InvokeAsync(GithubContext context, Func<Task> next)
+        public async Task InvokeAsync(GithubContext context, Func<Task> next)
         {
+            await next();
+
             if (context.Available)
             {
-                this.logger.LogInformation(context.ToString());
-            }
+                var mesage = new ScanOk(
+                    context.Domain,
+                    context.Address,
+                    context.Statistics.TotalScanCount,
+                    context.Statistics.GetSuccessRate(),
+                    context.Statistics.GetAvgElapsed()
+                    );
 
-            return next();
+                this.logger.LogInformation(mesage.ToString());
+            }
         }
     }
 }
diff --git a/FastGithub.Scanner/Middlewares/ScanElapsedMiddleware.cs b/FastGithub.Scanner/Middlewares/StatisticsMiddleware.cs
similarity index 67%
rename from FastGithub.Scanner/Middlewares/ScanElapsedMiddleware.cs
rename to FastGithub.Scanner/Middlewares/StatisticsMiddleware.cs
index 382c37b..ed2bfcb 100644
--- a/FastGithub.Scanner/Middlewares/ScanElapsedMiddleware.cs
+++ b/FastGithub.Scanner/Middlewares/StatisticsMiddleware.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 namespace FastGithub.Scanner.Middlewares
 {
     [Service(ServiceLifetime.Singleton)]
-    sealed class ScanElapsedMiddleware : IMiddleware<GithubContext>
+    sealed class StatisticsMiddleware : IMiddleware<GithubContext>
     {
         public async Task InvokeAsync(GithubContext context, Func<Task> next)
         {
@@ -14,12 +14,16 @@ namespace FastGithub.Scanner.Middlewares
             try
             {
                 stopwatch.Start();
+                context.Statistics.SetScan();
                 await next();
             }
             finally
             {
                 stopwatch.Stop();
-                context.Elapsed = stopwatch.Elapsed;
+                if (context.Available == true)
+                {
+                    context.Statistics.SetScanSuccess(stopwatch.Elapsed);
+                }
             }
         }
     }