SFML (render) texture stats

#define MCS(t) ((t).getElapsedTime().asMicroseconds())
#define SAMPLE_SIZE 4

    sf::Clock timer;
    sf::Texture *tex[SAMPLE_SIZE];
    sf::RenderTexture *rtex[SAMPLE_SIZE];

    {
        qDebug() << "Creating" << SAMPLE_SIZE << "512x512 RENDER textures";
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            rtex[i] = new sf::RenderTexture();
            rtex[i]->create(512, 512);
            qDebug() << i << ":" << MCS(timer);
        }
        timer.restart();
        for (int i = 0; i < SAMPLE_SIZE; i++)
            delete rtex[i];
        qDebug() << "Freeing took:" << MCS(timer) << "\n";
    }

    {
        qDebug() << "Creating" << SAMPLE_SIZE << "512x512 textures";
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            tex[i] = new sf::Texture();
            tex[i]->create(512, 512);
            qDebug() << i << ":" << MCS(timer);
        }
        timer.restart();
        for (int i = 0; i < SAMPLE_SIZE; i++)
            delete tex[i];
        qDebug() << "Freeing took:" << MCS(timer) << "\n";
    }

    {
        qDebug() << "Creating" << SAMPLE_SIZE << "512x512 textures AND render textures, interleaved";
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            tex[i] = new sf::Texture();
            tex[i]->create(512, 512);
            qDebug() << "tex " << i << ":" << MCS(timer);

            timer.restart();
            rtex[i] = new sf::RenderTexture();
            rtex[i]->create(512, 512);
            qDebug() << "rtex" << i << ":" << MCS(timer);
        }
        timer.restart();
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            delete tex[i];
            delete rtex[i];
        }
        qDebug() << "Freeing took:" << MCS(timer) << "\n";
    }

    {
        qDebug() << "Creating" << SAMPLE_SIZE << "512x512 textures with immediate free";
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            tex[i] = new sf::Texture();
            tex[i]->create(512, 512);
            qDebug() << i << ":" << MCS(timer);

            delete tex[i];
        }
        qDebug() << "\n";
    }

    {
        qDebug() << "Uploading 512x512 image data" << SAMPLE_SIZE << "times";
        sf::Texture tex;
        tex.create(512, 512);
        sf::Image image;
        image.loadFromFile("samples/512sample.png");
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            tex.update(image);
            qDebug() << i << ":" << MCS(timer);
        }
        qDebug() << "\n";
    }

    {
        qDebug() << "Downloading 512x512 image data" << SAMPLE_SIZE << "times";
        sf::Texture tex;
        tex.loadFromFile("samples/512sample.png");
        for (int i = 0; i < SAMPLE_SIZE; i++)
        {
            timer.restart();
            tex.copyToImage();
            qDebug() << i << ":" << MCS(timer);
        }
    }