Methods and systems are disclosed for traversing a graph database. The graph database may be used for search for information for a variety of applications, a web search and dictionary look-ups for voice recognitions for examples. Issues on quickly traversing a graph in the graph database with highly connected entities (nodes) may be addressed by generating a subgraph upon a graph traversal for an entity and traversing the subgraph in subsequent occurrences of looking up the entity. The methods and systems are disclosed for updating the entity of the subgraph with a newer version of data of the corresponding entity of the graph when the data in the entity of the subgraph and the data in the graph are distinct. The differences of versions of data may be identified based on an availability status of data for versions of data and timestamps of last updates to data in the entity of the graph.