According to what I understood from you that you would divide the txt file into another separate more files to reduce the quantity of coordinates into each one , but I think this is not the issue at the moment .
To speed up the process of importing coordinates and insert them as points at every coordinate of it , is what I am looking for .
Dividing file into pieces is not that important since Lee supported us with excellent one .
Your zip file hold only one file (index.php) only and there is not anything else .
Thank you so much for your time and for interests .