Add benchmark for nearest point calculation in triangle geometry (exa…

…mple)

kratos/benchmarks/example_benchmark.cpp

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+//    |  /           |
+//    ' /   __| _` | __|  _ \   __|
+//    . \  |   (   | |   (   |\__ `
+//   _|\_\_|  \__,_|\__|\___/ ____/
+//                   Multi-Physics
+//
+//  License:         BSD License
+//                   Kratos default license: kratos/license.txt
+//
+//  Main authors:    Vicente Mataix Ferrandiz
+//
+
+// System includes
+
+// External includes
+#include <benchmark/benchmark.h>
+
+// Project includes
+#include "geometries/point.h"
+#include "geometries/triangle_3d_3.h"
+#include "utilities/geometry_utilities/nearest_point_utilities.h"
+
+namespace Kratos
+{
+
+// Sample data for benchmarking
+Point::Pointer p_point_1(make_shared<Point>( 0.0, 0.0, 0.0));
+Point::Pointer p_point_2(make_shared<Point>( 1.0, 0.0, 0.0));
+Point::Pointer p_point_3(make_shared<Point>( 0.0, 1.0, 0.0));
+
+Triangle3D3<Point> triangle(p_point_1, p_point_3, p_point_2);
+Point nearest_point(0.0, 0.0, 0.0);
+Point inside_point(0.2, 0.1, 0.00);
+
+static void BM_TriangleNearestPoint(benchmark::State& state) {
+    for (auto _ : state) {
+        NearestPointUtilities::TriangleNearestPoint(inside_point, triangle, nearest_point);
+    }
+}
+
+// Register the function as a benchmark
+BENCHMARK(BM_TriangleNearestPoint);
+
+}  // namespace Kratos
+
+BENCHMARK_MAIN();