From 3ccc248ccd2871434a5fe627384765ccc80d86c6 Mon Sep 17 00:00:00 2001
From: bernd <baumannsbernd@gmail.com>
Date: Thu, 22 May 2025 13:40:01 +0200
Subject: [PATCH] avoid not needed compilationUnit clone

---
 src/Compilers/CSharp/Portable/Syntax/CSharpSyntaxTree.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Compilers/CSharp/Portable/Syntax/CSharpSyntaxTree.cs b/src/Compilers/CSharp/Portable/Syntax/CSharpSyntaxTree.cs
index c7c3d656049b5..6cf328da50821 100644
--- a/src/Compilers/CSharp/Portable/Syntax/CSharpSyntaxTree.cs
+++ b/src/Compilers/CSharp/Portable/Syntax/CSharpSyntaxTree.cs
@@ -515,7 +515,9 @@ public static SyntaxTree ParseText(
                 compilationUnit,
                 parser.Directives,
                 diagnosticOptions: diagnosticOptions,
-                cloneRoot: true);
+                cloneRoot: false);
+            Debug.Assert(compilationUnit._syntaxTree == null);
+            compilationUnit._syntaxTree = tree;
             tree.VerifySource();
             return tree;
         }