Method Find

tensorflow/core/framework/node_def_util.cc:176–195

}

const AttrValue* AttrSlice::Find(StringPiece attr_name) const {
  // Currently, the collection used for NodeDef::attr() (google::protobuf::Map)
  // requires that the keys used for lookups have type 'const string&'. Because
  // this method takes a StringPiece, it is necessary to allocate a temporary
  // string, copy attr_name to it, and then use that temporary string for the
  // lookup. This causes an excessive number of short-lived allocations, and for
  // large graphs, this can be a significant cost.
  //
  // Because most nodes have a small number of attributes, a simple linear scan
  // is generally more efficient than a hashed lookup.  If google::protobuf::Map
  // changes so that it supports efficient lookups using StringPiece instead of
  // const string&, then this code could be changed to use attrs_->find() again.

  for (const auto& attr : *attrs_) {
    if (attr.first == attr_name) {
      return &attr.second;
    }
  }
  return nullptr;
}

Status AttrSlice::Find(StringPiece attr_name,
                       const AttrValue** attr_value) const {