改善插入时的sqlite.net性能

Question

我有要存储在数据库中的记录数。
数据库的架构是这样的
像这样的人表：

CREATE TABLE IF NOT EXISTS Person (id INTEGER PRIMARY KEY, name TEXT)

和这样的文件表：

CREATE TABLE IF NOT EXISTS File (id INTEGER PRIMARY KEY, FileName TEXT,FilePath TEXT, PersonID NUMERIC CONSTRAINT person_file REFERENCES [Person]([id])ON DELETE NO ACTION ON UPDATE NO ACTION)

我使用此功能在两个表中进行插入

对于3700条记录，此代码在笔记本电脑上花费了140秒，

public long BuildDB(List<DB.Person> persons, List<DB.File> Files, FrmTrain form)
        {
            long result = -1;
            try
            {

                long personID = 0;
                using (SQLiteConnection sqlconnection = new SQLiteConnection("Data Source=" + DbPath + ";Version=3;"))
                {
                    sqlconnection.Open();
                    SQLiteCommand PersonCommand = sqlconnection.CreateCommand();
                    SQLiteParameter personParam = new SQLiteParameter();
                    PersonCommand.CommandText = "INSERT INTO Person('Name') VALUES(?)";
                    PersonCommand.Parameters.Add(personParam);


                    SQLiteCommand FileCommand = sqlconnection.CreateCommand();
                    SQLiteParameter FileParam1 = new SQLiteParameter("@filename");
                    SQLiteParameter FileParam2 = new SQLiteParameter("@filepath");
                    SQLiteParameter FileParam3 = new SQLiteParameter("@personid");

                    FileCommand.CommandText = "INSERT INTO file(FileName,FilePath,PersonID) VALUES(@filename,@filepath,@personid)";
                    FileCommand.Parameters.Add(FileParam1);
                    FileCommand.Parameters.Add(FileParam2);
                    FileCommand.Parameters.Add(FileParam3);
                    for (int i = 0; i < persons.Count; i++)
                    {
                        using (SQLiteTransaction _SQLiteTransaction = sqlconnection.BeginTransaction())
                        {
                            personParam.Value = persons[i].Name;
                            PersonCommand.ExecuteNonQuery();
                            personID = sqlconnection.LastInsertRowId;

                            foreach (var item in Files.Where(f => f.PersonID == personID))
                            {
                                FileParam1.Value = item.FileName;
                                FileParam2.Value = item.FilePath;
                                FileParam3.Value = item.PersonID;
                                FileCommand.ExecuteNonQuery();

                            }
                            _SQLiteTransaction.Commit();
                        }
                        form.Progress();
                    }
                    sqlconnection.Close();
                }
                result = 1;

            }
            catch (Exception e)
            {
                result = 0;
                throw;
            }



            return result;

        }

首先，我编写了没有事务的代码，并花了大约500秒的时间。

无论如何，有没有改善性能的方法？

Answer 1

尝试对所有插入的人员使用一个SQLiteTransaction，仅使用一次提交。

        try
        {

            long personID = 0;
            using (SQLiteConnection sqlconnection = new SQLiteConnection("Data Source=" + DbPath + ";Version=3;"))
            {
                sqlconnection.Open();
                SQLiteCommand PersonCommand = sqlconnection.CreateCommand();
                SQLiteParameter personParam = new SQLiteParameter();
                PersonCommand.CommandText = "INSERT INTO Person('Name') VALUES(?)";
                PersonCommand.Parameters.Add(personParam);


                SQLiteCommand FileCommand = sqlconnection.CreateCommand();
                SQLiteParameter FileParam1 = new SQLiteParameter("@filename");
                SQLiteParameter FileParam2 = new SQLiteParameter("@filepath");
                SQLiteParameter FileParam3 = new SQLiteParameter("@personid");

                FileCommand.CommandText = "INSERT INTO file(FileName,FilePath,PersonID) VALUES(@filename,@filepath,@personid)";
                FileCommand.Parameters.Add(FileParam1);
                FileCommand.Parameters.Add(FileParam2);
                FileCommand.Parameters.Add(FileParam3);
                using (SQLiteTransaction _SQLiteTransaction = sqlconnection.BeginTransaction())
                {
                    for (int i = 0; i < persons.Count; i++)
                    {
                        personParam.Value = persons[i].Name;
                        PersonCommand.ExecuteNonQuery();
                        personID = sqlconnection.LastInsertRowId;

                        foreach (var item in Files.Where(f => f.PersonID == personID))
                        {
                            FileParam1.Value = item.FileName;
                            FileParam2.Value = item.FilePath;
                            FileParam3.Value = item.PersonID;
                            FileCommand.ExecuteNonQuery();
                        }
                    }
                    _SQLiteTransaction.Commit();
                    form.Progress();
                }
                sqlconnection.Close();
            }
            result = 1;

        }
        catch (Exception e)
        {
            result = 0;
            throw;
        }