[Tizen] Precompile frequently used generic methods.submit/tizen/20190813.035844accepted/tizen/unified/20190813.215958

3 files changed, 48 insertions, 0 deletions

diff --git a/clr.featuredefines.props b/clr.featuredefines.props
index 929768fdbd..f365fc03cd 100644
--- a/clr.featuredefines.props
+++ b/clr.featuredefines.props
@@ -11,6 +11,9 @@
         <FeatureBasicFreeze>true</FeatureBasicFreeze>
         <FeatureDefaultInterfaces>true</FeatureDefaultInterfaces>
         <ProfilingSupportedBuild>true</ProfilingSupportedBuild>
+        <!--
+          This is Tizen-specific option: precompile frequently used instantiations of generics. -->
+        <PrecompileCommonGenerics>true</PrecompileCommonGenerics>
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(TargetsUnix)' == 'true'">
diff --git a/src/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/System.Private.CoreLib/System.Private.CoreLib.csproj
index 6b2b4e8875..0806b8fc80 100644
--- a/src/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -453,4 +453,11 @@
   </ItemGroup>
 
   <Import Project="ILLink.targets" />
+
+  <!--
+    This is Tizen-specific option: precompile frequently used instantiations of generics. -->
+  <ItemGroup Condition="'$(PrecompileCommonGenerics)' == 'true'">
+    <Compile Include="$(BclSourcesRoot)\Tizen\Precompile.cs" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/System.Private.CoreLib/src/Tizen/Precompile.cs b/src/System.Private.CoreLib/src/Tizen/Precompile.cs
new file mode 100644
index 0000000000..a314349e1f
--- /dev/null
+++ b/src/System.Private.CoreLib/src/Tizen/Precompile.cs
@@ -0,0 +1,38 @@
+// Copyright (C) 2019 Samsung Electronics Co., Ltd.
+// Licensed under the MIT License.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace Tizen
+{
+    public static class Precompile
+    {
+        public static void precompile()
+        {
+            new Lazy<double>();
+            new Lazy<int>();
+            new Lazy<object>();
+
+            new System.Threading.Tasks.TaskCompletionSource<bool>();
+
+            object? r;
+
+            var v1 = new System.Collections.Generic.Dictionary<System.IntPtr, object>();
+            System.IntPtr i = System.IntPtr.Zero;
+            v1.Remove(i);
+            v1.TryGetValue(i, out r);
+
+            var v2 = new System.Collections.Generic.Dictionary<object, object>();
+            object k = "";
+            v2.Remove(k);
+            v2.TryGetValue(k, out r);
+
+            var v3 = new System.Collections.Generic.List<object>();
+            object[] a = { "" };
+            v3.CopyTo(a, 0);
+            var t = v3.Count;
+            v3.Capacity = 0;
+        }
+}
+}