void XmlResultParser::_PrintLatencyPercentiles()

in XmlResultParser/XmlResultParser.cpp [396:500]
93 lines of code
17 McCabe index (conditional complexity)

void XmlResultParser::_PrintLatencyPercentiles(const Results& results)
{
    Histogram<float> readLatencyHistogram;
    Histogram<float> writeLatencyHistogram;
    Histogram<float> totalLatencyHistogram;

    for (const auto& thread : results.vThreadResults)
    {
        for (const auto& target : thread.vTargetResults)
        {
            readLatencyHistogram.Merge(target.readLatencyHistogram);

            writeLatencyHistogram.Merge(target.writeLatencyHistogram);

            totalLatencyHistogram.Merge(target.writeLatencyHistogram);
            totalLatencyHistogram.Merge(target.readLatencyHistogram);
        }
    }

    _PrintInc("<Latency>\n");
    if (readLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<AverageReadMilliseconds>%.3f</AverageReadMilliseconds>\n", readLatencyHistogram.GetAvg() / 1000);
        _Print("<ReadLatencyStdev>%.3f</ReadLatencyStdev>\n", readLatencyHistogram.GetStandardDeviation() / 1000);
    }
    if (writeLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<AverageWriteMilliseconds>%.3f</AverageWriteMilliseconds>\n", writeLatencyHistogram.GetAvg() / 1000);
        _Print("<WriteLatencyStdev>%.3f</WriteLatencyStdev>\n", writeLatencyHistogram.GetStandardDeviation() / 1000);
    }
    if (totalLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<AverageTotalMilliseconds>%.3f</AverageTotalMilliseconds>\n", totalLatencyHistogram.GetAvg() / 1000);
        _Print("<LatencyStdev>%.3f</LatencyStdev>\n", totalLatencyHistogram.GetStandardDeviation() / 1000);
    }

    _PrintInc("<Bucket>\n");
    _Print("<Percentile>0</Percentile>\n");
    if (readLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<ReadMilliseconds>%.3f</ReadMilliseconds>\n", readLatencyHistogram.GetMin() / 1000);
    }
    if (writeLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<WriteMilliseconds>%.3f</WriteMilliseconds>\n", writeLatencyHistogram.GetMin() / 1000);
    }
    if (totalLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<TotalMilliseconds>%.3f</TotalMilliseconds>\n", totalLatencyHistogram.GetMin() / 1000);
    }
    _PrintDec("</Bucket>\n");

    //  Construct vector of percentiles and decimal precision to squelch trailing zeroes.  This is more
    //  detailed than summary text output, and does not contain the decorated names (15th, etc.)

    vector<pair<int, double>> vPercentiles;
    for (int p = 1; p <= 99; p++)
    {
        vPercentiles.push_back(make_pair(0, p));
    }

    vPercentiles.push_back(make_pair(1, 99.9));
    vPercentiles.push_back(make_pair(2, 99.99));
    vPercentiles.push_back(make_pair(3, 99.999));
    vPercentiles.push_back(make_pair(4, 99.9999));
    vPercentiles.push_back(make_pair(5, 99.99999));
    vPercentiles.push_back(make_pair(6, 99.999999));
    vPercentiles.push_back(make_pair(7, 99.9999999));

    for (auto p : vPercentiles)
    {
        _PrintInc("<Bucket>\n");
        _Print("<Percentile>%.*f</Percentile>\n", p.first, p.second);
        if (readLatencyHistogram.GetSampleSize() > 0)
        {
            _Print("<ReadMilliseconds>%.3f</ReadMilliseconds>\n", readLatencyHistogram.GetPercentile(p.second / 100) / 1000);
        }
        if (writeLatencyHistogram.GetSampleSize() > 0)
        {
            _Print("<WriteMilliseconds>%.3f</WriteMilliseconds>\n", writeLatencyHistogram.GetPercentile(p.second / 100) / 1000);
        }
        if (totalLatencyHistogram.GetSampleSize() > 0)
        {
            _Print("<TotalMilliseconds>%.3f</TotalMilliseconds>\n", totalLatencyHistogram.GetPercentile(p.second / 100) / 1000);
        }
        _PrintDec("</Bucket>\n");
    }

    _PrintInc("<Bucket>\n");
    _Print("<Percentile>100</Percentile>\n"); 
    if (readLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<ReadMilliseconds>%.3f</ReadMilliseconds>\n", readLatencyHistogram.GetMax() / 1000);
    }
    if (writeLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<WriteMilliseconds>%.3f</WriteMilliseconds>\n", writeLatencyHistogram.GetMax() / 1000);
    }
    if (totalLatencyHistogram.GetSampleSize() > 0)
    {
        _Print("<TotalMilliseconds>%.3f</TotalMilliseconds>\n", totalLatencyHistogram.GetMax() / 1000);
    }
    _PrintDec("</Bucket>\n");
    _PrintDec("</Latency>\n");
}