message: Minor change: extra logging to help understand the effects of OptimizeGraph and PruneGraph calls.
diff: @@ -450,12 +450,16 @@ std::unique_ptr<GrapplerItem> GrapplerItemFromMetaGraphDef(
  }
  // Optimize the graph (function inlining, l1 optimizations, etc).
  + VLOG(1) << "Number of nodes in graph before OptimizeGraph: "
  + << new_item->graph.node_size();
  Status optimize_status =
  OptimizeGraph(new_item->graph, &new_item->graph, cfg);
  if (!optimize_status.ok()) {
  LOG(ERROR) << "Graph preprocessing failed: " << optimize_status;
  return nullptr;
  }
  + VLOG(1) << "Number of nodes in graph after OptimizeGraph: "
  + << new_item->graph.node_size();
  if (cfg.prune_graph) {
  VLOG(1) << "Pruning graph...";
  @@ -464,7 +468,8 @@ std::unique_ptr<GrapplerItem> GrapplerItemFromMetaGraphDef(
  LOG(ERROR) << "Pruning failed: " << status.error_message();
  return nullptr;
  }
  - VLOG(1) << "Pruning ran succesfully.";
  + VLOG(1) << "Number of nodes in graph after pruning: "
  + << new_item->graph.node_size();
  }
  // Validate feed, fetch and init nodes
  