bench_move_semantics.cpp
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1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2020 Sebastien Boisvert <seb@boisvert.info>
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>
20 {
21  MatrixType tmp(m);
22  m = tmp;
23 }
24 
25 template <typename MatrixType>
27 {
28  MatrixType tmp(std::move(m));
29  m = std::move(tmp);
30 }
31 
32 template<typename Scalar>
33 void bench(const std::string& label)
34 {
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 
51 int main()
52 {
53  bench<float>("float");
54  bench<double>("double");
55  return 0;
56 }
57 
MatrixType
MatrixXf MatrixType
Definition: benchmark-blocking-sizes.cpp:52
move_matrix
void move_matrix(MatrixType &&m)
Definition: bench_move_semantics.cpp:26
data
int data[]
Definition: Map_placement_new.cpp:1
Eigen::BenchTimer
Definition: BenchTimer.h:59
main
int main()
Definition: bench_move_semantics.cpp:51
bench
void bench(const std::string &label)
Definition: bench_move_semantics.cpp:33
BENCH
#define BENCH(TIMER, TRIES, REP, CODE)
Definition: BenchTimer.h:174
m
Matrix3f m
Definition: AngleAxis_mimic_euler.cpp:1
Eigen::CPU_TIMER
@ CPU_TIMER
Definition: BenchTimer.h:48
BenchTimer.h
copy_matrix
void copy_matrix(MatrixType &m)
Definition: bench_move_semantics.cpp:19
Eigen::Matrix
The matrix class, also used for vectors and row-vectors.
Definition: 3rdparty/Eigen/Eigen/src/Core/Matrix.h:178
align_3::t
Point2 t(10, 10)


gtsam
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autogenerated on Sun Dec 22 2024 04:11:11