Question about Monitor

I looked at my private sent message. I said Zero, but I did send you one message, So I am posting it here again since I was not sure whether you had actually received the message.

My message:

I used Timing Optimization Advisor[TOA] to tweak my design. The results were not consistent. [some times the teaks seems to work and some times it doesn't. Some times there are variations in the normal cases[with no tweaks] that outperforms the cases with tweaks]

Here are my observations:

observation 1:

Some of the settings after following the TOA suggestions looked like this:

restructure multiplexers: OFF

state machine encoding: One Hot

smart compilation: ON.

In spite of this the Fmax did not exceed one of the cases when I hadn't followed the TOA suggestions.

observation 2:

The compilation time did not change after switching the "Smart Compilation" option to ON. But in one case it reduced from 12min to 8 min.

Are these options reliable? Looks like the randomness that occurs during the compilation is very dominant. Am I doing something wrong?

Thanks,

AA