Fast DataTable loading from IDataReader

I was using the Load method of DataTable to load data from IDataReader the other day, and while profiling the application I found out that this is my program bottleneck.

I've just wrote a quick & dirty function which does the same task much faster:

private static DataTable ReaderToDataTable(IDataReader reader)
{
    int fieldCount = reader.FieldCount;
    DataTable result = new DataTable("Query Result");
    for (int i = 0; i < reader.FieldCount; i++)
    {
        DataColumn column = result.Columns.Add(reader.GetName(i));
        column.DataType = reader.GetFieldType(i);
    }

    object[] row = new object[fieldCount];
    while (reader.Read())
    {
        reader.GetValues(row);
        result.Rows.Add(row);
    }

    return result;
}