From 5074d67379bdb90ce43fa066222fbb7b87d8bf48 Mon Sep 17 00:00:00 2001
From: BaronGreenback <jimcartlidge@yahoo.co.uk>
Date: Sat, 27 Feb 2021 21:17:58 +0000
Subject: [PATCH] performance

---
 MediaBrowser.Common/Net/IPHost.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/MediaBrowser.Common/Net/IPHost.cs b/MediaBrowser.Common/Net/IPHost.cs
index 84aebb6e78..4a7c701907 100644
--- a/MediaBrowser.Common/Net/IPHost.cs
+++ b/MediaBrowser.Common/Net/IPHost.cs
@@ -178,8 +178,9 @@ namespace MediaBrowser.Common.Net
 
             // Use regular expression as CheckHostName isn't RFC5892 compliant.
             // Modified from gSkinner's expression at https://stackoverflow.com/questions/11809631/fully-qualified-domain-name-validation
-            Regex re = new Regex(@"^(?!:\/\/)(?=.{1,255}$)((.{1,63}\.){0,127}(?![0-9]*$)[a-z0-9-]+\.?)$", RegexOptions.IgnoreCase | RegexOptions.Multiline);
-            if (re.Match(host).Success)
+            string pattern = @"(?im)^(?!:\/\/)(?=.{1,255}$)((.{1,63}\.){0,127}(?![0-9]*$)[a-z0-9-]+\.?)$";
+
+            if (Regex.IsMatch(host, pattern))
             {
                 hostObj = new IPHost(host);
                 return true;