Which Is Better Datareader or Dataadapter

Using a DataReader produces faster results than using a DataAdapter to return the same data. Because the DataAdapter actually uses a DataReader to retrieve data, this should not surprise us. But there are many other reasons as well. DataReaders provide multiple asynchronous methods that can be employed.

Is DataReader faster than DataAdapter?

Datareaders are fast compare to DataAdapters/DataSets because of the following reason. DataReader offers better performance because it avoids the performance and memory overhead associated with the creation of the DataSet.

Which is better in respect of performance DataReader and DataAdapter )?

SqlDataReader will be faster than SQlDataAdapter because it works in a connected state which means the first result is returned from query as soon as its available ..