Even with my anti-virus turned off (which is not something I like to do), I timed opening a new remote file with my watch, and got a time of 4.8 seconds (using the stopwatch mode) with 6.17, vs. 2.4 seconds with 6.16.

Closing the script editor, again with just an empty file, had a time of 6.6 seconds with 6.17 and 3.3 seconds with 6.16