I’ve had it generating and uploading every 5 mins 24/7 since about the end of July or so. So it’s well tried, and tested! Others have been using it with the old system too and I’ve had no reports of computers going sluggish. The file comes out at about 50kb so it can take a couple of seconds to upload. However, the script has a failsafe built in just in case a visitor opens a page at the same moment that the tag file is being uploaded. In a nut Shell, it just reloads the page, by which time the upload is complete. So the visitor never sees any missing data or nasty error messages.