Download of course is slowed by maybe 50% due to full CPU utilization (equal priority, with network at 16 logical threads and validation at 64). But at the last download there were 65k buffered blocks - tens of millions of txs. Memory got no higher than 30%, which is basically a normal run. Once the node hit 50k blocks, CPU shot from 30% (with only 600 blocks validated) to 100% and stayed there until completion (100k).
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