从SQLite上传文本数据到服务器是更快还是文本文件？

My application receives a lot of data every milliseconds(name,id,value,.. of a signal from a simulator device). and I should upload this data to MySQL server. First I need to save them in a database and upload them to the server via GSM network. The reason that I save data into the mobile device is that the connection is so slow and the app receives a quite large number of data at a time and cannot upload them at once, also it may encounter disconnection problem. In fact, I just need a temporary storage and I don't want to do any data manipulation in the SQLite. Currently I am writing the data to the simple text file (CSV) and then upload every 20 lines to the server using name/value pairs in Android HttpPost, but what about SQLite? Is it faster to insert data to SQLite and then upload it? Which approach is preferable?My application receives a lot of data every mil