#256 - Differentiator Performance

xFunc.Benchmark/Benchmarks/DifferentiatorBenchmark.cs

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+// Copyright 2012-2020 Dmytro Kyshchenko
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+// express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using BenchmarkDotNet.Attributes;
+using xFunc.Maths.Analyzers;
+using xFunc.Maths.Expressions;
+using xFunc.Maths.Expressions.Trigonometric;
+
+namespace xFunc.Benchmark.Benchmarks
+{
+    public class DifferentiatorBenchmark
+    {
+        private Differentiator differentiator;
+
+        private IExpression complexExp;
+
+        [GlobalSetup]
+        public void Setup()
+        {
+            differentiator = new Differentiator();
+
+            // (abs(sin(cos(tan(ctg(x ^ 2))))) - ln(x ^ 2)) + arcsin(arccos(arctan(arcctg(x ^ 10))))
+            complexExp = new Add(
+                new Sub(
+                    new Abs(new Sin(new Cos(new Tan(new Cot(new Pow(Variable.X, new Number(2))))))),
+                    new Ln(new Pow(Variable.X, new Number(2)))
+                ),
+                new Arcsin(new Arccos(new Arctan(new Arccot(new Pow(Variable.X, new Number(10))))))
+            );
+        }
+
+        [Benchmark]
+        public IExpression ComplexExpression() =>
+            complexExp.Analyze(differentiator);
+    }
+}