Function spinEventLoop

app/src/Benchmark/HotpathBenchmark.cpp:152–158

* @brief Pumps the GUI event loop once and returns the wall-clock it consumed (discounted from * the measurement so a repaint never deflates throughput). */

 * the measurement so a repaint never deflates throughput).
 */
[[nodiscard]] static double spinEventLoop()
{
  using Clock      = std::chrono::steady_clock;
  const auto start = Clock::now();
  QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  return std::chrono::duration<double>(Clock::now() - start).count();
}

//--------------------------------------------------------------------------------------------------
// Benchmark-active flag (read by UI::Dashboard::streamAvailable)