Hello Philipp,
Several months ago, I thought about reproducable builds for qflow, specifically Graywolf, and I came to problem that Graywolf had poor single-threaded performance for huge projects, so parallelisation was the obvious solution for that, but I did not had a good idea how simulated annealing could be done in a reproducable way in parallel.
The way to go is not to use simulated annealing (e.g., graywolf) but to use analytic placement (e.g., RePlaCe from abk-openroad (UCSD) on github).
---Tim
+--------------------------------+-------------------------------------+ | R. Timothy Edwards (Tim) | email: tim@opencircuitdesign.com | | Open Circuit Design | web: http://opencircuitdesign.com | | 19601 Jerusalem Road | phone: (240) 489-3255 | | Poolesville, MD 20837 | cell: (408) 828-8212 | +--------------------------------+-------------------------------------+