1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2020 Sebastien Boisvert <[email protected]>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #include "BenchTimer.h"
11 #include "../test/MovableScalar.h"
12
13 #include <Eigen/Core>
14
15 #include <iostream>
16 #include <utility>
17
18 template <typename MatrixType>
copy_matrix(MatrixType & m)19 void copy_matrix(MatrixType& m)
20 {
21 MatrixType tmp(m);
22 m = tmp;
23 }
24
25 template <typename MatrixType>
move_matrix(MatrixType && m)26 void move_matrix(MatrixType&& m)
27 {
28 MatrixType tmp(std::move(m));
29 m = std::move(tmp);
30 }
31
32 template<typename Scalar>
bench(const std::string & label)33 void bench(const std::string& label)
34 {
35 using MatrixType = Eigen::Matrix<Eigen::MovableScalar<Scalar>,1,10>;
36 Eigen::BenchTimer t;
37
38 int tries = 10;
39 int rep = 1000000;
40
41 MatrixType data = MatrixType::Random().eval();
42 MatrixType dest;
43
44 BENCH(t, tries, rep, copy_matrix(data));
45 std::cout << label << " copy semantics: " << 1e3*t.best(Eigen::CPU_TIMER) << " ms" << std::endl;
46
47 BENCH(t, tries, rep, move_matrix(std::move(data)));
48 std::cout << label << " move semantics: " << 1e3*t.best(Eigen::CPU_TIMER) << " ms" << std::endl;
49 }
50
main()51 int main()
52 {
53 bench<float>("float");
54 bench<double>("double");
55 return 0;
56 }
57
58