void GApp::endFrame()

in projects/hvvr_samples/modelviewer/modelviewer.cpp [263:317]
44 lines of code
8 McCabe index (conditional complexity)

void GApp::endFrame() {
    if (m_settings.outputMode == OUTPUT_3D_API) {
        uint32_t syncInterval = m_settings.vSync;
        m_window->copyAndPresent(syncInterval);
    }
    // collect some overall perf statistics
    {
        struct FrameStats {
            float deltaTime;
            uint32_t rayCount;
        };
        enum { frameStatsWindowSize = 64 };
        static FrameStats frameStats[frameStatsWindowSize] = {};
        static int frameStatsPos = 0;

        uint32_t rayCount = m_camera->getSampleCount();

        frameStats[frameStatsPos].deltaTime = (float)m_deltaTime;
        frameStats[frameStatsPos].rayCount = rayCount;

        // let it run for a bit before collecting numbers
        if (frameStatsPos == 0 && m_frameID > frameStatsWindowSize * 4) {
            static double frameTimeAvgTotal = 0.0;
            static uint64_t frameTimeAvgCount = 0;

            // search for the fastest frame in the history window which matches the current state of the raycaster
            int fastestMatchingFrame = -1;
            for (int n = 0; n < frameStatsWindowSize; n++) {
                frameTimeAvgTotal += frameStats[n].deltaTime;
                frameTimeAvgCount++;

                if (fastestMatchingFrame == -1 ||
                    frameStats[n].deltaTime < frameStats[fastestMatchingFrame].deltaTime) {
                    fastestMatchingFrame = n;
                }
            }
            assert(fastestMatchingFrame >= 0 && fastestMatchingFrame < frameStatsWindowSize);
            const FrameStats& fastestFrame = frameStats[fastestMatchingFrame];

            float frameTimeAvg = float(frameTimeAvgTotal / double(frameTimeAvgCount));

            printf("%.0f (%.0f) mrays/s"
                   ", %.2f (%.2f) ms frametime"
                   ", %u x %u rays"
                   "\n",
                   fastestFrame.rayCount / fastestFrame.deltaTime / 1000000.0f * hvvr::COLOR_MODE_MSAA_RATE,
                   fastestFrame.rayCount / frameTimeAvg / 1000000.0f * hvvr::COLOR_MODE_MSAA_RATE,
                   fastestFrame.deltaTime * 1000, frameTimeAvg * 1000, fastestFrame.rayCount,
                   hvvr::COLOR_MODE_MSAA_RATE);
        }
        frameStatsPos = (frameStatsPos + 1) % frameStatsWindowSize;
    }

    m_frameID++;
}