低端RX Vega 8的集成显卡，搜索速度还是64 visit/s 没变。

不知道这个搜索算法的改进，是不是体现在实际选择上。
Major improvements in KataGo's search algorithm. KataGo might be somewhere around 75 Elo stronger than v1.8.2 with the same latest neural nets. Half of this improvement might also be applicable to older/smaller nets, although not tested. Thanks to @sbbdms and @fuhaoda for extensive help testing these parameters.

Major improvements in multithreaded search performance on stronger GPUs, or with multiple GPUs, by implementing close-to-lockless MCTS search. (merging the long-open "highthreads" code branch). In the extreme case, performance on multiple A100s might be more than doubled.
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