Paddle/paddle/fluid/inference/api/timer.h

// Copyright (c) 2018 PaddlePaddle Authors. 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.
#pragma once

#include <chrono>  // NOLINT

namespace paddle {
namespace inference {

// Timer for timer
class Timer {
 public:
  std::chrono::high_resolution_clock::time_point start;
  std::chrono::high_resolution_clock::time_point startu;

  void tic() { start = std::chrono::high_resolution_clock::now(); }
  double toc() {
    startu = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> time_span =
        std::chrono::duration_cast<std::chrono::duration<double>>(startu -
                                                                  start);
    double used_time_ms = static_cast<double>(time_span.count()) * 1000.0;
    return used_time_ms;
  }
};

}  // namespace inference
}  // namespace paddle