diff --git a/ZeroLevel.UnitTests/CollectionsTests.cs b/ZeroLevel.UnitTests/CollectionsTests.cs
index 9625cc2..ad4a77a 100644
--- a/ZeroLevel.UnitTests/CollectionsTests.cs
+++ b/ZeroLevel.UnitTests/CollectionsTests.cs
@@ -86,5 +86,33 @@ namespace ZeroLevel.CollectionUnitTests
             Assert.True(fix.Count == 2);
             Assert.True(CollectionComparsionExtensions.OrderingEquals(fix.Dump().ToArray(), new long[] { 4, 5 }));
         }
+
+        [Fact]
+        public void ChunkifyTest()
+        {
+            // Arrange
+            var arr = new long[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+            var empty_arr = new long[0];
+
+            // Act
+            var empty_chunks = empty_arr.Chunkify(3).ToArray();
+            var chunks_2 = arr.Chunkify(2).ToArray();
+            var chunks_3 = arr.Chunkify(3).ToArray();
+
+            // Assert
+            Assert.True(empty_chunks.Length == 0);
+            Assert.True(chunks_2.Length == 5);
+            Assert.True(chunks_3.Length == 3);
+
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_3[0], new long[] { 1, 2, 3 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_3[1], new long[] { 4, 5, 6 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_3[2], new long[] { 7, 8, 9 }));
+
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_2[0], new long[] { 1, 2 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_2[1], new long[] { 3, 4 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_2[2], new long[] { 5, 6 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_2[3], new long[] { 7, 8 }));
+            Assert.True(CollectionComparsionExtensions.OrderingEquals(chunks_2[4], new long[] { 9 }));
+        }
     }
 }
diff --git a/ZeroLevel/DataStructures/SparceVector.cs b/ZeroLevel/DataStructures/SparceVector.cs
index fc11f69..80ab0d8 100644
--- a/ZeroLevel/DataStructures/SparceVector.cs
+++ b/ZeroLevel/DataStructures/SparceVector.cs
@@ -15,8 +15,6 @@ namespace ZeroLevel.DataStructures
         private double[] values;
         private double power;
 
-
-
         public SparceVector() 
         {
             indexes = EmptyIndexes;
diff --git a/ZeroLevel/Services/Extensions/LinqExtension.cs b/ZeroLevel/Services/Extensions/LinqExtension.cs
index 863cf76..c305db9 100644
--- a/ZeroLevel/Services/Extensions/LinqExtension.cs
+++ b/ZeroLevel/Services/Extensions/LinqExtension.cs
@@ -71,10 +71,24 @@ namespace System.Linq
             {
                 throw new ArgumentException("chunkSize must be greater than 0.");
             }
-            while (source.Any())
+            T[] arr = new T[size];
+            int index = 0;
+            foreach (var obj in source)
             {
-                yield return source.Take(size);
-                source = source.Skip(size);
+                arr[index] = obj;
+                index++;
+                if (index >= size)
+                {
+                    yield return arr;
+                    index = 0;
+                    arr = new T[size];
+                }
+            }
+            if (index > 0)
+            {
+                var narr = new T[index];
+                Array.Copy(arr, narr, index);
+                yield return narr;
             }
         }
     }
diff --git a/ZeroLevel/Services/FileSystem/PeriodicFileSystemWatcher.cs b/ZeroLevel/Services/FileSystem/PeriodicFileSystemWatcher.cs
index 0dccc52..b56fc82 100644
--- a/ZeroLevel/Services/FileSystem/PeriodicFileSystemWatcher.cs
+++ b/ZeroLevel/Services/FileSystem/PeriodicFileSystemWatcher.cs
@@ -89,7 +89,7 @@ namespace ZeroLevel.Services.FileSystem
         /// <summary>
         /// Moving a file to a temporary directory
         /// </summary>
-        public string MoveToTemporary(string from)
+        private string MoveToTemporary(string from)
         {
             if (from == null)
             {
@@ -139,7 +139,7 @@ namespace ZeroLevel.Services.FileSystem
         /// <summary>
         /// Getting a list of files from the input directory
         /// </summary>
-        public string[] GetFilesFromSource()
+        private string[] GetFilesFromSource()
         {
             string[] files = Directory.GetFiles(_sourceFolder, "*.*", SearchOption.TopDirectoryOnly);
             Array.Sort<string>(files, FileNameSortCompare);
diff --git a/ZeroLevel/Services/Network/BaseSocket.cs b/ZeroLevel/Services/Network/BaseSocket.cs
index e1f04b2..f690363 100644
--- a/ZeroLevel/Services/Network/BaseSocket.cs
+++ b/ZeroLevel/Services/Network/BaseSocket.cs
@@ -26,12 +26,12 @@ namespace ZeroLevel.Network
         /// <summary>
         /// If during the specified period there was no network activity, send a ping-request
         /// </summary>
-        internal const long HEARTBEAT_PING_PERIOD_TICKS = 1500 * TimeSpan.TicksPerMillisecond;
+        internal const long HEARTBEAT_PING_PERIOD_TICKS = 3000 * TimeSpan.TicksPerMillisecond;
 
         /// <summary>
         /// Connection check period
         /// </summary>
-        internal const int MINIMUM_HEARTBEAT_UPDATE_PERIOD_MS = 7500;
+        internal const int MINIMUM_HEARTBEAT_UPDATE_PERIOD_MS = 15000;
 
         /// <summary>
         /// The period of the request, after which it is considered unsuccessful
diff --git a/ZeroLevel/ZeroLevel.csproj b/ZeroLevel/ZeroLevel.csproj
index 0b17998..742fff9 100644
--- a/ZeroLevel/ZeroLevel.csproj
+++ b/ZeroLevel/ZeroLevel.csproj
@@ -6,7 +6,7 @@
 </Description>
     <Authors>ogoun</Authors>
     <Company>ogoun</Company>
-    <AssemblyVersion>3.3.4.0</AssemblyVersion>
+    <AssemblyVersion>3.3.4.2</AssemblyVersion>
     <PackageReleaseNotes>Refactoring</PackageReleaseNotes>
     <PackageProjectUrl>https://github.com/ogoun/Zero/wiki</PackageProjectUrl>
     <Copyright>Copyright Ogoun 2020</Copyright>
@@ -14,8 +14,8 @@
     <PackageIconUrl></PackageIconUrl>
     <RepositoryUrl>https://github.com/ogoun/Zero</RepositoryUrl>
     <RepositoryType>GitHub</RepositoryType>
-    <Version>3.3.4</Version>
-    <FileVersion>3.3.4.1</FileVersion>
+    <Version>3.3.4.2</Version>
+    <FileVersion>3.3.4.2</FileVersion>
     <Platforms>AnyCPU;x64</Platforms>
     <PackageIcon>zero.png</PackageIcon>
   </PropertyGroup>