Function StartTiming

tensorflow/core/platform/default/test_benchmark.cc:288–290

void BytesProcessed(int64 n) { bytes_processed = n; }
void ItemsProcessed(int64 n) { items_processed = n; }
void StartTiming() {
  if (start_time == 0) start_time = env->NowMicros();
}
void StopTiming() {
  if (start_time != 0) {
    accum_time += (env->NowMicros() - start_time);