dotnet: add startup performance test program

Author: jwatson0

runtime/dotnet-perf/dotnet-perf/.gitignore

@@ -0,0 +1,5 @@
+bin/
+obj/
+_site/
+api/
+docs/

runtime/dotnet-perf/dotnet-perf/Program.cs

@@ -0,0 +1,10 @@
+namespace dotnet_perf;
+
+class Program
+{
+    static void Main(string[] args)
+    {
+        int x = 2 + 2;
+        Console.WriteLine(String.Format("2 + 2 = {0}", x));
+    }
+}

runtime/dotnet-perf/dotnet-perf/dotnet-perf.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>dotnet_perf</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

runtime/dotnet-perf/dotnet-perf/z_RESULTS.md

@@ -0,0 +1,74 @@
+
+# dotnet build -c Release 
+
+roughly 24/sec
+
+$ time for ((i=0;i<10;i++)) ; do bin/Release/net10.0/dotnet-perf >/dev/null ; done
+real    0m0.467s
+user    0m0.359s
+sys     0m0.096s
+
+$ time for ((i=0;i<100;i++)) ; do bin/Release/net10.0/dotnet-perf >/dev/null ; done
+real    0m4.233s
+user    0m3.330s
+sys     0m0.887s
+
+$ time for ((i=0;i<1000;i++)) ; do bin/Release/net10.0/dotnet-perf >/dev/null ; done
+real    0m41.149s
+user    0m32.093s
+sys     0m9.015s
+
+$ time for ((i=0;i<10000;i++)) ; do bin/Release/net10.0/dotnet-perf >/dev/null ; done
+real    6m51.120s
+user    5m22.929s
+sys     1m27.905s
+
+# dotnet build -c Release --self-contained
+
+roughly 24/sec
+
+$ time for ((i=0;i<10;i++)) ; do bin/Release/net10.0/linux-x64/dotnet-perf >/dev/null ; done
+real    0m0.509s
+user    0m0.344s
+sys     0m0.124s
+
+$ time for ((i=0;i<100;i++)) ; do bin/Release/net10.0/linux-x64/dotnet-perf >/dev/null ; done
+real    0m4.208s
+user    0m3.275s
+sys     0m0.894s
+
+$ time for ((i=0;i<1000;i++)) ; do bin/Release/net10.0/linux-x64/dotnet-perf >/dev/null ; done
+real    0m40.971s
+user    0m31.909s
+sys     0m9.033s
+
+$ time for ((i=0;i<10000;i++)) ; do bin/Release/net10.0/linux-x64/dotnet-perf >/dev/null ; done
+real    6m48.798s
+user    5m20.406s
+sys     1m28.199s
+
+
+# dotnet publish -r linux-x64 -p:PublishSingleFile=true --self-contained true
+
+roughly 24/sec
+
+$ time for ((i=0;i<10;i++)) ; do bin/Release/net10.0/linux-x64/publish/dotnet-perf >/dev/null ; done
+real    0m0.490s
+user    0m0.329s
+sys     0m0.123s
+
+$ time for ((i=0;i<100;i++)) ; do bin/Release/net10.0/linux-x64/publish/dotnet-perf >/dev/null ; done
+real    0m4.117s
+user    0m3.286s
+sys     0m0.830s
+
+$ time for ((i=0;i<1000;i++)) ; do bin/Release/net10.0/linux-x64/publish/dotnet-perf >/dev/null ; done
+real    0m40.340s
+user    0m32.257s
+sys     0m8.171s
+
+$ time for ((i=0;i<10000;i++)) ; do bin/Release/net10.0/linux-x64/publish/dotnet-perf >/dev/null ; done
+real    6m43.044s
+user    5m20.058s
+sys     1m23.876s
+