diff --git a/src/libse/Common/SeLogger.cs b/src/libse/Common/SeLogger.cs
index a3f5e78bd..ab998a3dc 100644
--- a/src/libse/Common/SeLogger.cs
+++ b/src/libse/Common/SeLogger.cs
@@ -7,7 +7,6 @@ namespace Nikse.SubtitleEdit.Core.Common
 {
     public static class SeLogger
     {
-
         public static string ErrorFile => Path.Combine(Configuration.DataDirectory, "error_log.txt");
 
         public static void Error(Exception exception, string message = null)
@@ -102,7 +101,16 @@ namespace Nikse.SubtitleEdit.Core.Common
             return Path.Combine(Configuration.DataDirectory, "whisper_log.txt");
         }
 
-        private static string GetSeInfo()
+        /// <summary>
+        /// Get information about the machine that is cached and accessed by the SeLogger class.
+        /// </summary>
+        /// <returns>A string representing information about the machine.</returns>
+        private static string GetSeInfo() => CachedMachineInfo.Value;
+
+        /// <summary>
+        /// Represents information about the machine that is cached and accessed by the <see cref="SeLogger"/> class.
+        /// </summary>
+        private static readonly Lazy<string> CachedMachineInfo = new Lazy<string>(() =>
         {
             try
             {
@@ -112,6 +120,6 @@ namespace Nikse.SubtitleEdit.Core.Common
             {
                 return string.Empty;
             }
-        }
+        });
     }
-}
+}
\ No newline at end of file
diff --git a/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs b/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs
deleted file mode 100644
index 9afe911ba..000000000
--- a/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs
+++ /dev/null
@@ -1,30 +0,0 @@
-using System;
-
-namespace Nikse.SubtitleEdit.Core.Common.TextLengthCalculator
-{
-    public static class TextLengthHelper
-    {
-        public static decimal CountCharacters(string text, bool forCps)
-        {
-            return CalcFactory.MakeCalculator(Configuration.Settings.General.CpsLineLengthStrategy).CountCharacters(text, forCps);
-        }
-
-        public static bool IsKnownHtmlTag(string input, int index)
-        {
-            var s = input.Remove(0, index + 1).ToLowerInvariant();
-            return s.StartsWith('/') ||
-                   s.StartsWith("i>", StringComparison.Ordinal) ||
-                   s.StartsWith("b>", StringComparison.Ordinal) ||
-                   s.StartsWith("u>", StringComparison.Ordinal) ||
-                   s.StartsWith("font ", StringComparison.Ordinal) ||
-                   s.StartsWith("ruby", StringComparison.Ordinal) ||
-                   s.StartsWith("span>", StringComparison.Ordinal) ||
-                   s.StartsWith("span ", StringComparison.Ordinal) ||
-                   s.StartsWith("p>", StringComparison.Ordinal) ||
-                   s.StartsWith("br>", StringComparison.Ordinal) ||
-                   s.StartsWith("box>", StringComparison.Ordinal) ||
-                   s.StartsWith("div>", StringComparison.Ordinal) ||
-                   s.StartsWith("div ", StringComparison.Ordinal);
-        }
-    }
-}
\ No newline at end of file