Hi Arnaud, Thanks for your thorough test.
>That's not surprising, IMHO, it's like concatenation: as the room is filled, >each piece added is harder to arrange than the previous. I understand this, but still I believe maybe there can be some performance improvement in the command. I cannot believe that after inserting 400 columns 4D needs near to half a second to do this. >each ctrl+D displays the wheel of death, each time longer than the previous. I >could never bear such waiting time! ->-> 4D appreciates much better duplicate at runtime. In my tests I also saw this happening. Duplicating each listbox in the form editor with 20 columns took longer and longer. I didn't know / expected this to be faster in runtime. Gr, Piotr ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************