336 - Lattice Diamond: Why does my static timing score not improve after adding place and route iterations?

336 - Lattice Diamond: Why does my static timing score not improve after adding place and route iterations?

Fundamentally, the static time score will depend on the router's perfomance, which will vary from design to design. Typically for a small design, a timing score will reach a certain level after a few iterations and adding more iterations might not make it better. For larger designs, the timing score typically takes more iterations to reach a stable level.