优化使用Enterprise库执行的插入查询

Question

我编写了一个SQL SP来在MSSQL表中插入记录

CREATE PROCEDURE AddAmazonIT
@BatchID INT,
@ITName NVARCHAR(MAX)
AS
BEGIN
    INSERT INTO tbl_AmazonITMaster
    (Batch_Id,IT_Name)
    VALUES
    (@BatchID,@ITName)

    SELECT @@IDENTITY
END

我有大约15000条记录要插入DB，
我使用企业库ExecuteScalar方法调用SP ...
插入数据时需要花费很多时间

C＃Object Manager类如下：

public class BaseRepository
{
    private string _key = "SqlDatabase"; 
    public SqlDatabase Db
    {
        get {
            if (ContextRepository.GetData(_key) == null)
            {
                ContextRepository.SetData(_key, DatabaseFactory.CreateDatabase());
            }
            return (SqlDatabase)ContextRepository.GetData(_key);
        }
    }

    public SqlConnection Con
    {
        get {
            return new SqlConnection(ConfigurationManager.ConnectionStrings["PTMap"].ConnectionString);
        }
    }
}

public class AmazonITRepository:BaseRepository
{
    public int Add(AmazonIT it)
    {
        return Convert.ToInt32(Db.ExecuteScalar("AddAmazonIT", it.Batch_Id, it.IT_Name));
    }
}

关于如何优化这个的任何想法？