// If neither max_seconds or max_iters is set, stop at kDefaultMicros.
  const int64_t max_us = (options.max_micros <= 0 && options.max_iters <= 0)
                             ? Options::kDefaultMicros
                             : options.max_micros;
  // NOLINTNEXTLINE
  printf("Running benchmark for %lld us\n", static_cast<long long>(max_us));
  const int64_t start_us = NowMicros();