Wire length vs Timing
Two floorplans use the same netlist and timing constraints:
Metric | Floorplan P | Floorplan Q |
|---|---|---|
Estimated total wirelength | Lower | Higher |
Critical macro-to-register distance | Longer | Shorter |
Congestion near critical macro pins | Higher | Lower |
Floorplan Q achieves better setup timing after routing.
What is the strongest explanation?