diff --git a/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj b/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
index bcf50a6a..51867193 100644
--- a/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
+++ b/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
   <PropertyGroup>
     <LangVersion>latest</LangVersion>
-    <TargetFramework>net472</TargetFramework>
+    <TargetFramework>net48</TargetFramework>
     <DefineConstants></DefineConstants>
     <Optimize>true</Optimize>
     <Configurations>Debug;Release</Configurations>
diff --git a/source/DefaultEcs.Benchmark/DefaultEcs/System.cs b/source/DefaultEcs.Benchmark/DefaultEcs/System.cs
index d9abfc53..cc67ce95 100644
--- a/source/DefaultEcs.Benchmark/DefaultEcs/System.cs
+++ b/source/DefaultEcs.Benchmark/DefaultEcs/System.cs
@@ -20,7 +20,7 @@ public static void ProcessInParallel(this EntitySet set, EntitySetProcess action
     }
 
     [MemoryDiagnoser]
-    [SimpleJob(RunStrategy.Monitoring, launchCount: 1, warmupCount: 10, targetCount: 20, invocationCount: 1000)]
+    [SimpleJob(RunStrategy.Monitoring, launchCount: 1, warmupCount: 10, targetCount: 20, invocationCount: 100)]
     public class System
     {
         private struct Position
@@ -59,18 +59,15 @@ public Test2System(World world, SystemRunner<float> runner)
 
             protected override void Update(float state, ReadOnlySpan<Entity> entities)
             {
-                for (int i = 0; i < entities.Length; i++)
+                foreach (ref readonly Entity entity in entities)
                 {
-                    Speed speed = entities[i].Get<Speed>();
-                    ref Position position = ref entities[i].Get<Position>();
+                    Speed speed = entity.Get<Speed>();
+                    ref Position position = ref entity.Get<Position>();
 
                     position.X += speed.X * state;
                     position.Y += speed.Y * state;
                 }
             }
-
-            protected override void Update(float state, in Entity entity)
-            { }
         }
 
         private sealed class TestSystemTPL : ISystem<float>
diff --git a/source/DefaultEcs.Benchmark/Program.cs b/source/DefaultEcs.Benchmark/Program.cs
index cf0d4115..8a4c5bf1 100644
--- a/source/DefaultEcs.Benchmark/Program.cs
+++ b/source/DefaultEcs.Benchmark/Program.cs
@@ -10,10 +10,10 @@ private static void Main()
             {
                 //typeof(DefaultEcs.CreateEntity),
                 //typeof(DefaultEcs.EntitySetFilter),
-                typeof(DefaultEcs.MultipleFilterImpact),
+                //typeof(DefaultEcs.MultipleFilterImpact),
                 //typeof(DefaultEcs.EntitySetEnumeration),
                 //typeof(DefaultEcs.EntitySetWithComponentEnumeration),
-                //typeof(DefaultEcs.System),
+                typeof(DefaultEcs.System),
                 //typeof(DefaultEcs.Recorder),
                 //typeof(DefaultEcs.Serialization),
                 //typeof(Performance.SingleComponentEntityEnumeration),