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#include "base/time_samples.hpp"
#include "std/cmath.hpp"
namespace my
{
void TimeSamples::Add(double seconds)
{
m_sum += seconds;
m_sum2 += seconds * seconds;
++m_total;
}
double TimeSamples::GetMean() const { return m_total == 0 ? 0.0 : m_sum / m_total; }
double TimeSamples::GetSD() const
{
if (m_total < 2)
return 0.0;
return std::max((m_sum2 - m_sum * m_sum / static_cast<double>(m_total)) / (m_total - 1), 0.0);
}
double TimeSamples::GetVar() const { return sqrt(GetSD()); }
} // namespace my
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