I've got a complicated design for a 24x36x300dpi poster. When exporting, the "Estimating File Size" dialog says "calculating." If I don't hit save very quickly, or if I make any changes (file type, resolution, quality, etc.), then my CPU does the following and the program is unresponsive:
400% for 50 seconds
100% for over 10 minutes
I'm able to interact with the dialog after the initial period, but that would kick off another 50 seconds of 400% CPU.
Eventually the result is shown : "Estimated File Size: 10.16 MB"
When I hit "Save" to create a PNG-24, the CPU goes to 400% for a minute, then to 100%. The Export Item dialog doesn't show any progress. I'll let you know if it finishes. *Update: it took about 10 minutes to export*
I'm on a 2015 13" MBP, El Cap 10.11.6, 2.9GHz i5, 8GB RAM
Here's the file
https://www.dropbox.com/s/ko43ev14mv8zg3p/PHL-alt.afdesign?dl=0