message: In Batch op, move Tensors into output, as opposed to copy.
diff: @@ -526,7 +526,7 @@ class BatchResource : public ResourceBase {
  for (int j = 0; j < batch->num_tasks(); ++j) {
  BatchTask& task = *(batch->mutable_task(j));
  - task.context->set_output(i, split_tensor.at(j));
  + task.context->set_output(i, std::move(split_tensor.at(j)));
  } // (Ignore a possible final split_tensors entry containing the
  // padding.)
  }
  