Hi Jim & Peter,
I wanted to connect the dots here to make sure you, Jim, have Peter's files.
I buglisted the issue and two large sample files last Tuesday, November 10 at 5pm. The file number is: VB-128895
The performance slowdown of the strictly 2D files from v2013 to v2016 (and 2014 & 2015 along the way) is perplexing indeed.
Thanks for your help with this Jim!
-Neil