Hey Allan,
We had a discussion two years ago about an export performance issue when going from TableTools to Buttons, which you solved perfectly, so trying my luck again 
When trying to update to the latest DT version, I observed a similar performance drop, that you can see here:
- With 1.10.16: 5 seconds to export
- With 1.10.19: 90 seconds to export
I tested on all the latest versions and it actually happens starting with 1.10.17. Again that kind of prevents updating to the latest version - do you have any idea why this is and how to solve it?
Thanks again for your amazing work!