Stats.h

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#pragma once
 
 
#include "bench/Common.h"
#include "objects/wrappers/Interval.h"
 
NAMESPACE_BENCHMARK_BEGIN
 
class Stats {
private:
    Float sum = 0._f;
    Float sumSqr = 0._f;
    Size cnt = 0;
    Interval range;
 
public:
    INLINE void add(const Float value) {
        sum += value;
        sumSqr += sqr(value);
        range.extend(value);
        cnt++;
    }
 
    INLINE Float mean() const {
        SPH_ASSERT(cnt != 0);
        return sum / cnt;
    }
 
    INLINE Float variance() const {
        if (cnt < 2) {
            return INFTY;
        }
        const Float cntInv = 1._f / cnt;
        return cntInv * (sumSqr * cntInv - sqr(sum * cntInv));
    }
 
    INLINE Size count() const {
        return cnt;
    }
 
    INLINE Float min() const {
        return range.lower();
    }
 
    INLINE Float max() const {
        return range.upper();
    }
};
 
NAMESPACE_BENCHMARK_END