From 0961dc4f6b04b48c68a317f6f7faf24d3f80ad5e Mon Sep 17 00:00:00 2001
From: mlemanczyk <marek@lemanczyk.eu>
Date: Sat, 24 Jun 2023 00:50:50 +0200
Subject: [PATCH] Integral comparison benchmarks added

---
 .../LessOperatorvsAndOperatorBenchmarks.cs    | 49 +++++++++++++++++++
 Recyclable.Collections.Benchmarks/Program.cs  |  1 +
 2 files changed, 50 insertions(+)
 create mode 100644 Recyclable.Collections.Benchmarks/POC/LessOperatorvsAndOperatorBenchmarks.cs

diff --git a/Recyclable.Collections.Benchmarks/POC/LessOperatorvsAndOperatorBenchmarks.cs b/Recyclable.Collections.Benchmarks/POC/LessOperatorvsAndOperatorBenchmarks.cs
new file mode 100644
index 0000000..3683729
--- /dev/null
+++ b/Recyclable.Collections.Benchmarks/POC/LessOperatorvsAndOperatorBenchmarks.cs
@@ -0,0 +1,49 @@
+using BenchmarkDotNet.Attributes;
+using System.Runtime.CompilerServices;
+
+namespace Recyclable.Collections.Benchmarks.POC
+{
+	public class LessOperatorVsAndOperatorBenchmarks
+	{
+		private const int bitShift = 1 << 31;
+		private static Random _rnd = new(1);
+		private static int num = -Math.Abs(_rnd.Next());
+
+		public void Setup()
+		{
+			num = -1;
+			Console.WriteLine($"*** We're comparing if {num} is < 0 ***");
+		}
+
+		public void Cleanup() { }
+
+		[MethodImpl(MethodImplOptions.NoInlining)]
+		private static void DoNothing<T>(T item)
+		{ }
+
+
+		[Benchmark(Baseline = true)]
+		public void CompareWithLess()
+		{
+			DoNothing(num < 0);
+		}
+
+		[Benchmark]
+		public void CompareWithAnd()
+		{
+			DoNothing((num & bitShift) != 0);
+		}
+
+		[Benchmark]
+		public void CompareWithEqual()
+		{
+			DoNothing(num == -1);
+		}
+
+		[Benchmark]
+		public void CompareToZero()
+		{
+			DoNothing(num == 0);
+		}
+	}
+}
diff --git a/Recyclable.Collections.Benchmarks/Program.cs b/Recyclable.Collections.Benchmarks/Program.cs
index 14f5bbd..ec37549 100644
--- a/Recyclable.Collections.Benchmarks/Program.cs
+++ b/Recyclable.Collections.Benchmarks/Program.cs
@@ -46,6 +46,7 @@ public static class Program
 		_ = BenchmarkRunner.Run<WhenParallelSearchBenchmarks>(BenchmarkConfig);
 		_ = BenchmarkRunner.Run<RoundBenchmarks>(BenchmarkConfig);
 		_ = BenchmarkRunner.Run<SpanVsArrayBenchmarks>(BenchmarkConfig);
+		_ = BenchmarkRunner.Run<LessOperatorVsAndOperatorBenchmarks>(BenchmarkConfig);
 		// ArraySizeLimitPocBenchmarks>(BenchmarkConfig);
 	}