Array to Excel

I believe it's time to consult the experts on what I am trying to do...I am trying to take a large text file and write it to an Excel spreadsheet. After 2 days of trial and error I finally got it to work. What I would like help with is on making it faster. In my opinion it is taking WAY too long to write these values to the worksheet.

SCRIPT:

 test.au3   2.23K   2 downloads

TEXT FILE:

 aptsource.txt   1.1MB   2 downloads