S6608: Update benchmarks code sample and results (#3980)

rules/S6608/resources-dotnet.adoc

@@ -11,18 +11,12 @@
 [options="header"]
 |===
 | Method | Runtime | Mean | Standard Deviation
-| ElementAt | .NET 7.0 | 15,193.1 ns |  233.47 ns
-| Index | .NET 7.0 | 9,465.6 ns | 148.16 ns
-| First | .NET 7.0 | 7,790.2 ns | 165.70 ns
-| First_Index | .NET 7.0 | 398.5 ns | 5.36 ns
-| Last | .NET 7.0 | 7,398.2 ns |  152.48 ns
-| Last_Index | .NET 7.0 | 347.3 ns | 5.47 ns
-| ElementAt | .NET Framework 4.6.2 | 12,205.7 ns | 298.49 ns
-| Index | .NET Framework 4.6.2 | 8,917.8 ns | 51.55 ns
-| First | .NET Framework 4.6.2 | 5,109.1 ns | 100.13 ns
-| First_Index | .NET Framework 4.6.2 | 566.0 ns | 6.56 ns
-| Last | .NET Framework 4.6.2 | 5,052.7 ns | 76.02 ns
-| Last_Index | .NET Framework 4.6.2 | 680.7 ns | 9.56 ns
+|   ElementAt | 3,403.4 ns |  28.52 ns |  26.67 ns
+|       Index |   478.0 ns |   6.93 ns |   6.48 ns
+|       First | 6,160.0 ns |  57.66 ns |  53.93 ns
+| First_Index |   485.7 ns |   5.81 ns |   5.15 ns
+|        Last | 6,034.3 ns |  20.34 ns |  16.98 ns
+|  Last_Index |   408.3 ns |   2.54 ns |   2.38 ns
 |===
 
 ==== Glossary
@@ -47,74 +41,96 @@ public int LoopSize;
 public void Setup()
 {
     random = new Random(42);
+
     var bytes = new byte[SampleSize];
     random.NextBytes(bytes);
     data = bytes.ToList();
 }
 
 [Benchmark]
-public void ElementAt()
+public int ElementAt()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        var index = random.Next(0, SampleSize);
-        _ = data.ElementAt(index);
+        result = data.ElementAt(i);
     }
+
+    return result;
 }
 
 [Benchmark]
-public void Index()
+public int Index()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        var index = random.Next(0, SampleSize);
-        _ = data[index];
+        result = data[i];
     }
+
+    return result;
 }
 
 [Benchmark]
-public void First()
+public int First()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        _ = data.First();
+        result = data.First();
     }
+
+    return result;
 }
 
 [Benchmark]
-public void First_Index()
+public int First_Index()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        _ = data[0];
+        result = data[0];
     }
+
+    return result;
 }
 
 [Benchmark]
-public void Last()
+public int Last()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        _ = data.Last();
+        result = data.Last();
     }
+
+    return result;
 }
 
 [Benchmark]
-public void Last_Index()
+public int Last_Index()
 {
-    for (int i = 0; i < LoopSize; i++)
+    int result = default;
+
+    for (var i = 0; i < LoopSize; i++)
     {
-        _ = data[data.Count - 1];
+        result = data[data.Count - 1];
     }
+
+    return result;
 }
 ----
 
 Hardware configuration:
 ----
-BenchmarkDotNet=v0.13.5, OS=Windows 10 (10.0.19045.2846/22H2/2022Update)
+BenchmarkDotNet=v0.13.5, OS=Windows 10 (10.0.19045.4412/22H2/2022Update)
 11th Gen Intel Core i7-11850H 2.50GHz, 1 CPU, 16 logical and 8 physical cores
-.NET SDK=7.0.203
-  [Host]               : .NET 7.0.5 (7.0.523.17405), X64 RyuJIT AVX2
-  .NET 7.0             : .NET 7.0.5 (7.0.523.17405), X64 RyuJIT AVX2
-  .NET Framework 4.6.2 : .NET Framework 4.8.1 (4.8.9139.0), X64 RyuJIT VectorSize=256
+.NET SDK=8.0.301
+  [Host]   : .NET 8.0.6 (8.0.624.26715), X64 RyuJIT AVX2
+  .NET 8.0 : .NET 8.0.6 (8.0.624.26715), X64 RyuJIT AVX2
 ----