Additional POC benchmarks added.

Recyclable.Collections.Benchmarks/POC/RoundBenchmarks.cs

@@ -0,0 +1,27 @@
+using BenchmarkDotNet.Attributes;
+
+namespace Recyclable.Collections.Benchmarks.POC
+{
+	public class RoundBenchmarks : PocBenchmarkBase
+	{
+		private const double OptimalParallelSearchStep = 0.329;
+
+		[Benchmark(Baseline = true)]
+		public void RoundWithMathFloor()
+		{
+			DoNothing((long)Math.Floor(TestObjectCount * OptimalParallelSearchStep));
+		}
+
+		[Benchmark]
+		public void RoundWithMathRound()
+		{
+			DoNothing((long)Math.Round(TestObjectCount * OptimalParallelSearchStep, 0));
+		}
+
+		[Benchmark(Baseline = false)]
+		public void RoundWithTypeCasting()
+		{
+			DoNothing((long)(TestObjectCount * OptimalParallelSearchStep));
+		}
+	}
+}