From 08fef959698ca70e3ef3445a3a3aac44b0fd703e Mon Sep 17 00:00:00 2001
From: Ryan Nowak <nowakra@gmail.com>
Date: Fri, 15 Jan 2016 10:18:40 -0800
Subject: [PATCH] Remove a String.Split

---
 .../TagHelpers/TagHelperParseTreeRewriter.cs  | 23 +++++++++++++++----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/Microsoft.AspNet.Razor/Parser/TagHelpers/TagHelperParseTreeRewriter.cs b/src/Microsoft.AspNet.Razor/Parser/TagHelpers/TagHelperParseTreeRewriter.cs
index 163e80ab44..f9704e3441 100644
--- a/src/Microsoft.AspNet.Razor/Parser/TagHelpers/TagHelperParseTreeRewriter.cs
+++ b/src/Microsoft.AspNet.Razor/Parser/TagHelpers/TagHelperParseTreeRewriter.cs
@@ -324,12 +324,25 @@ namespace Microsoft.AspNet.Razor.Parser.TagHelpers.Internal
                     childSpan = child as Span;
                 }
 
-                var attributeName = childSpan
-                    .Content
-                    .Split(separator: new[] { '=' }, count: 2)[0]
-                    .TrimStart();
+                var start = 0;
+                for (; start < childSpan.Content.Length; start++)
+                {
+                    if (!char.IsWhiteSpace(childSpan.Content[start]))
+                    {
+                        break;
+                    }
+                }
 
-                attributeNames.Add(attributeName);
+                var end = 0;
+                for (end = start; end < childSpan.Content.Length; end++)
+                {
+                    if (childSpan.Content[end] == '=')
+                    {
+                        break;
+                    }
+                }
+
+                attributeNames.Add(childSpan.Content.Substring(start, end - start));
             }
 
             return attributeNames;