Use StringBuilderPool

Author: jjonescz

src/Compiler/Directory.Packages.props

@@ -15,6 +15,7 @@
     <PackageVersion Include="Microsoft.Css.Parser" Version="$(MicrosoftCssParserVersion)" />
     <PackageVersion Include="Microsoft.Extensions.DependencyModel" Version="$(MicrosoftExtensionsDependencyModelVersion)" />
     <PackageVersion Include="Microsoft.Extensions.FileSystemGlobbing" Version="$(MicrosoftExtensionsFileSystemGlobbingVersion)" />
+    <PackageVersion Include="Microsoft.Extensions.ObjectPool" Version="$(MicrosoftExtensionsPackageVersion)" />
     <PackageVersion Include="Microsoft.NET.Sdk.Razor.SourceGenerators.Transport" Version="$(Benchmarks_BaselineSourceGeneratorsVersion)" />
     <PackageVersion Include="Moq" Version="$(MoqVersion)" />
     <PackageVersion Include="Newtonsoft.Json" Version="$(NewtonsoftJsonVersion)" />

src/Compiler/Microsoft.AspNetCore.Razor.Language/src/Microsoft.AspNetCore.Razor.Language.csproj

@@ -9,6 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\..\Razor\src\Microsoft.AspNetCore.Razor.Common\Microsoft.AspNetCore.Razor.Common.csproj" />
     <ProjectReference Include="$(SharedSourceRoot)\Microsoft.AspNetCore.Razor.LanguageSupport\Microsoft.AspNetCore.Razor.LanguageSupport.csproj" />
   </ItemGroup>
 

src/Compiler/Microsoft.AspNetCore.Razor.Language/src/Syntax/SyntaxNodeExtensions.cs

@@ -7,6 +7,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using Microsoft.AspNetCore.Razor.Language.Legacy;
+using Microsoft.AspNetCore.Razor.PooledObjects;
 
 namespace Microsoft.AspNetCore.Razor.Language.Syntax;
 
@@ -204,7 +205,8 @@ public static TRoot InsertNodesAfter<TRoot>(this TRoot root, SyntaxNode nodeInLi
 
     public static string GetContent<TNode>(this TNode node) where TNode : SyntaxNode
     {
-        using var writer = new System.IO.StringWriter();
+        using var _ = StringBuilderPool.GetPooledObject(out var sb);
+        using var writer = new System.IO.StringWriter(sb);
         node.Green.WriteTo(writer);
         return writer.ToString();
     }

src/Compiler/tools/Microsoft.AspNetCore.Razor.SourceGenerator.Tooling.Internal/Microsoft.AspNetCore.Razor.SourceGenerator.Tooling.Internal.csproj

@@ -26,10 +26,15 @@
       ClassName="Microsoft.AspNetCore.Mvc.Razor.Extensions.RazorExtensionsResources" />
 
     <Compile Include="$(SharedSourceRoot)\Microsoft.AspNetCore.Razor.LanguageSupport\NullableAttributes.cs" LinkBase="LanguageSupport" />
+
+    <Compile Include="..\..\..\Razor\src\Microsoft.AspNetCore.Razor.Common\PooledObjects\**\*.cs" LinkBase="PooledObjects" />
+
+    <Compile Include="..\..\..\Razor\src\Microsoft.AspNetCore.Razor.Common\Utilities\**\*.cs" LinkBase="Utilities" />
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.Extensions.ObjectPool" PrivateAssets="All" />
   </ItemGroup>
 
 </Project>