Replace the m_buckets unsorted map with a lock-free version
based on atomic pointers. (BucketMap)
remove the m_leafs and move those into the bucket struct.
Make the access to the jumptable transactional to avoid one big lock
over all datastructures.
On my threadripper 2990WX the entire 150GB BCH blockchain was
parsed and imported in under 3 hours.
tomFlowee
TomZ