extras/benchmark/new_delete_benchmark.cpp

/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * 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.
 */

#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
#include <vector>

#if MULTIPLIER == 1
#define REPEAT(X) REPEAT_1(X, _)

#elif MULTIPLIER == 10
#define REPEAT(X) REPEAT_10(X, _)

#elif MULTIPLIER == 100
#define REPEAT(X) REPEAT_100(X, _)

#elif MULTIPLIER == 250
#define REPEAT(X) REPEAT_250(X, _)

#elif MULTIPLIER == 1000
#define REPEAT(X) REPEAT_1000(X, _)

#else
#error Multiplier not supported.
#endif

#define PLACEHOLDER

#define EVAL0(...) __VA_ARGS__
#define EVAL1(...) EVAL0(EVAL0(EVAL0(EVAL0(__VA_ARGS__))))
#define EVAL2(...) EVAL1(EVAL1(EVAL1(EVAL1(__VA_ARGS__))))
#define EVAL(...) EVAL2(EVAL2(EVAL2(EVAL2(__VA_ARGS__))))

#define META_REPEAT_10(R, X, I)                                                                                        \
  R PLACEHOLDER(X, I##0) R PLACEHOLDER(X, I##1) R PLACEHOLDER(X, I##2) R PLACEHOLDER(X, I##3) R PLACEHOLDER(X, I##4)   \
      R PLACEHOLDER(X, I##5) R PLACEHOLDER(X, I##6) R PLACEHOLDER(X, I##7) R PLACEHOLDER(X, I##8)                      \
          R PLACEHOLDER(X, I##9)

#define META_REPEAT_5(R, X, I)                                                                                        \
  R PLACEHOLDER(X, I##0) R PLACEHOLDER(X, I##1) R PLACEHOLDER(X, I##2) R PLACEHOLDER(X, I##3) R PLACEHOLDER(X, I##4)

#define REPEAT_1(X, I) X(I)

#define REPEAT_5(X, I) META_REPEAT_5(REPEAT_1, X, I)

#define REPEAT_10(X, I) META_REPEAT_10(REPEAT_1, X, I)

#define REPEAT_25(X, I) META_REPEAT_5(REPEAT_5, X, I)

#define REPEAT_100(X, I) META_REPEAT_10(REPEAT_10, X, I)

#define REPEAT_250(X, I) META_REPEAT_10(REPEAT_25, X, I)

#define REPEAT_1000(X, I) META_REPEAT_10(REPEAT_100, X, I)

using namespace std;

#define DEFINITIONS(N)                                                                                                 \
  struct I##N {                                                                                                        \
    virtual ~I##N() = default;                                                                                         \
  };                                                                                                                   \
                                                                                                                       \
  struct C##N : public I##N {                                                                                          \
    virtual ~C##N() = default;                                                                                         \
  };

#define ALLOCATE(N) C##N* c##N = new C##N();

#define DEALLOCATE(N) delete c##N;

EVAL(REPEAT(DEFINITIONS))

int main(int argc, const char* argv[]) {
  if (argc != 2) {
    std::cout << "Error: you need to specify the number of loops as argument." << std::endl;
    return 1;
  }
  size_t num_loops = std::atoi(argv[1]);

  std::chrono::high_resolution_clock::time_point start_time = std::chrono::high_resolution_clock::now();

  for (size_t i = 0; i < num_loops; i++) {
    EVAL(REPEAT(ALLOCATE))
    EVAL(REPEAT(DEALLOCATE))
  }
  double totalTime =
      std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::high_resolution_clock::now() - start_time)
          .count();

  std::cout << std::fixed;
  std::cout << std::setprecision(15);
  std::cout << "Total           = " << totalTime * 1.0 / num_loops << std::endl;

  return 0;
}