Function calcClockResolution

src/bench/nanobench.h:2037–2049

determines resolution of the given clock. This is done by measuring multiple times and returning the minimum time difference.

// determines resolution of the given clock. This is done by measuring multiple times and returning the minimum time difference.
Clock::duration calcClockResolution(size_t numEvaluations) noexcept {
    auto bestDuration = Clock::duration::max();
    Clock::time_point tBegin;
    Clock::time_point tEnd;
    for (size_t i = 0; i < numEvaluations; ++i) {
        tBegin = Clock::now();
        do {
            tEnd = Clock::now();
        } while (tBegin == tEnd);
        bestDuration = (std::min)(bestDuration, tEnd - tBegin);
    }
    return bestDuration;
}

// Calculates clock resolution once, and remembers the result
Clock::duration clockResolution() noexcept {