Don't optimize away method issue need your help

Hi FvM,

Thanks for your kindly reply!

I am unconnectly these days, and sorry for the delay of this reply.

I attach my project, and i found "ignore lcell" setting is not activity for my project or CPLD devices. When i set off or auto, the result is same.

I found beow your reply in another thread:

"However, regarding achieved delay, I don't see additional options to increase it, except for routing the signal in and out of I/O pins. You should also consider, that you don't necessarily increase the delay by using a slower speed grade. The specification is about maximum delay, these devices are designed as logic chips rather than delay lines."

Do you mean that I don't need to trust the tpd report? If will these tpd information change after implemented into CPLD device?