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Diffstat (limited to 'src/Bottleneck_distance/benchmark/bottleneck_chrono.cpp')
-rw-r--r-- | src/Bottleneck_distance/benchmark/bottleneck_chrono.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/Bottleneck_distance/benchmark/bottleneck_chrono.cpp b/src/Bottleneck_distance/benchmark/bottleneck_chrono.cpp new file mode 100644 index 00000000..456c570b --- /dev/null +++ b/src/Bottleneck_distance/benchmark/bottleneck_chrono.cpp @@ -0,0 +1,62 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author: Francois Godi + * + * Copyright (C) 2015 INRIA + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <gudhi/Bottleneck.h> +#include <chrono> +#include <fstream> +#include <random> + +using namespace Gudhi::persistence_diagram; + + +double upper_bound = 400.; // any real > 0 + +int main() { + std::ofstream result_file; + result_file.open("results.csv", std::ios::out); + + for (int n = 1000; n <= 10000; n += 1000) { + std::uniform_real_distribution<double> unif1(0., upper_bound); + std::uniform_real_distribution<double> unif2(upper_bound / 1000., upper_bound / 100.); + std::default_random_engine re; + std::vector< std::pair<double, double> > v1, v2; + for (int i = 0; i < n; i++) { + double a = unif1(re); + double b = unif1(re); + double x = unif2(re); + double y = unif2(re); + v1.emplace_back(std::min(a, b), std::max(a, b)); + v2.emplace_back(std::min(a, b) + std::min(x, y), std::max(a, b) + std::max(x, y)); + if (i % 5 == 0) + v1.emplace_back(std::min(a, b), std::min(a, b) + x); + if (i % 3 == 0) + v2.emplace_back(std::max(a, b), std::max(a, b) + y); + } + std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now(); + double b = bottleneck_distance(v1, v2); + std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now(); + typedef std::chrono::duration<int, std::milli> millisecs_t; + millisecs_t duration(std::chrono::duration_cast<millisecs_t>(end - start)); + result_file << n << ";" << duration.count() << ";" << b << std::endl; + } + result_file.close(); +} |