问具有大数据的QChart和QAreaSeries非常慢。

EN

#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QAreaSeries>
#include <QRandomGenerator>

#include <QDateTime>
#include <QtCharts/QHXYModelMapper>
#include <QTimer>

#include "boost/range/irange.hpp"

QT_CHARTS_USE_NAMESPACE


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    auto *upper = new QLineSeries;
    auto *lower = new QLineSeries;
    auto *generator = QRandomGenerator::global();

    const auto maxSamples = 10000;

    for(auto x : boost::irange(0, maxSamples))
    {
        lower->append(QPointF(x, 0));
        upper->append(QPointF(x, generator->bounded(0, 100)));
    }

    auto *series = new QAreaSeries(upper, lower);

    QChart *chart = new QChart();
    chart->addSeries(series);
    chart->createDefaultAxes();
    chart->legend()->setVisible(false);

    chart->axisY(series)->setRange(0, 100);

    QChartView *chartView = new QChartView(chart);
    //chartView->setRenderHint(QPainter::Antialiasing);

    QMainWindow window;
    window.setCentralWidget(chartView);
    window.resize(800, 600);
    window.show();

    return a.exec();
}