Currently, it takes days (Sapphire, mainnet) for iterative state sync to finish.

State sync should be benchmarked and optimized.

Possible bottlenecks:

1. Default fetcher pool has 4 workers (see).
   • Possibly increase, also bottleneck could be number of peers for diff fetching.
2. Fetching, applying diffs and finalizing versions (see) are three completely independent processes.
   • Currently this is not implemented optimally and processes may block each other.
   • See original discussion here.