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#pragma once
#include "base/timer.hpp"
#include "std/cstdint.hpp"
namespace my
{
// This class can be used in measurements of code blocks performance.
// It can accumulate time samples, and can calculate mean time and
// standard deviation.
//
// *NOTE* This class is NOT thread-safe.
class TimeSamples final
{
public:
void Add(double seconds);
// Mean of the accumulated time samples.
double GetMean() const;
// Unbiased standard deviation of the accumulated time samples.
double GetSD() const;
// Unbiased variance of the accumulated time samples.
double GetVar() const;
private:
double m_sum = 0.0;
double m_sum2 = 0.0;
size_t m_total = 0;
};
// This class can be used as a single scoped time sample. It
// automatically adds time sample on destruction.
//
// *NOTE* This class is NOT thread-safe.
class ScopedTimeSample final
{
public:
ScopedTimeSample(TimeSamples & ts) : m_ts(ts) {}
~ScopedTimeSample() { m_ts.Add(m_t.ElapsedSeconds()); }
private:
TimeSamples & m_ts;
my::Timer m_t;
};
} // namespace my
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