#ifndef CAFFE2_CORE_TIMER_H_
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#define CAFFE2_CORE_TIMER_H_
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#include <chrono>
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#include "caffe2/core/common.h"
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namespace caffe2 {
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/**
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* @brief A simple timer object for measuring time.
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*
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* This is a minimal class around a std::chrono::high_resolution_clock that
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* serves as a utility class for testing code.
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*/
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class Timer {
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public:
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typedef std::chrono::high_resolution_clock clock;
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typedef std::chrono::nanoseconds ns;
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Timer() { Start(); }
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/**
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* @brief Starts a timer.
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*/
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inline void Start() { start_time_ = clock::now(); }
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inline float NanoSeconds() {
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return static_cast<float>(
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std::chrono::duration_cast<ns>(clock::now() - start_time_).count());
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}
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/**
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* @brief Returns the elapsed time in milliseconds.
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*/
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inline float MilliSeconds() { return NanoSeconds() / 1000000.f; }
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/**
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* @brief Returns the elapsed time in microseconds.
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*/
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inline float MicroSeconds() { return NanoSeconds() / 1000.f; }
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/**
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* @brief Returns the elapsed time in seconds.
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*/
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inline float Seconds() { return NanoSeconds() / 1000000000.f; }
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protected:
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std::chrono::time_point<clock> start_time_;
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C10_DISABLE_COPY_AND_ASSIGN(Timer);
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};
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}
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#endif // CAFFE2_CORE_TIMER_H_
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